If you see kerbalx application error when opening a craft page or the main website, the first thing to determine is whether the problem is on your side or with KerbalX itself.
KerbalX is a web based craft sharing service for Kerbal Space Program. Its current site identifies itself as version 1.5.10 and describes the service as being in rolling development. Its terms also acknowledge that parts of the site can occasionally break during development.
That matters because browser troubleshooting will not repair a server side problem.
There have also been community reports of KerbalX returning an application error while the rest of the internet was working normally. In some cases the site returned to normal later without users changing anything.
Before You Start Must Read This 5 Important Points
- A KerbalX error can come from the website or your local setup.
- Test KerbalX in another browser before changing KSP files.
- Craft Manager depends on KXAPI for KerbalX integration.
- A site wide outage cannot usually be fixed from your computer.
- Disabling KerbalX integration can keep Craft Manager usable during service problems.
First Check Whether KerbalX Is Working
Before clearing browser data or reinstalling KSP mods, check whether the website itself is responding.
Open:
- The KerbalX homepage
- Another craft page
- A help page
- A page that does not require your account
If several unrelated KerbalX pages fail, the issue is less likely to be one broken craft link.
You can also test the website from another browser. A separate device or internet connection provides an even stronger comparison.
What the result tells you
| Test result | More likely cause |
|---|---|
| Only one craft page fails | Specific page or craft issue |
| Normal browser fails but private mode works | Cache, cookies or extension |
| Chrome fails but another browser works | Browser specific issue |
| Website fails on several browsers | KerbalX or network issue |
| Website works but KSP integration fails | Craft Manager, KXAPI or authentication issue |
| KerbalX fails for several users | Likely service side problem |
These checks do not prove the cause by themselves. They help narrow down where the problem is occurring.
Try a Private Browser Window
Open KerbalX in Chrome Incognito, Firefox Private Browsing or an equivalent private browsing mode.
This creates a useful test because your normal browser session may contain:
- Old cookies
- Cached files
- Extensions
- Stored login information
- Site specific settings
If KerbalX works in a private window, return to your normal browser and investigate extensions and stored site data.
If it fails in both modes, move on to the next checks instead of repeatedly clearing the same data.
Clear KerbalX Cookies and Cached Data
A corrupted or outdated browser cache can cause a website to display an older or incomplete version of a page.
You do not necessarily need to erase your entire browsing history.
If your browser allows individual site data removal, clear the data associated with KerbalX and then open the site again.
After clearing the data:
- Close the KerbalX tabs.
- Open a new browser window.
- Visit KerbalX again.
- Test the same page that produced the error.
If the problem remains across browsers, clearing more cache data is unlikely to solve a server side failure.
Disable Extensions Temporarily
Browser extensions can interfere with website requests or page scripts.
This can happen with extensions that block:
- Advertisements
- Tracking scripts
- JavaScript
- Cookies
- Cross site requests
- Suspicious network activity
Temporarily disable extensions and reload KerbalX.
If the site works afterward, enable the extensions one at a time until you identify the one causing the conflict.
Do not permanently disable security software simply to make a website work. The goal is to identify a conflict and then adjust the specific setting if necessary.
Check Your Network and DNS
If KerbalX fails in your normal browser and private mode, test the connection itself.
Try:
- Another Wi-Fi network
- A mobile hotspot
- Another device
- A different DNS configuration if you already know how to change it
If KerbalX works on another connection, your local network or DNS path may be involved.
A useful comparison is to open several unrelated websites at the same time. If everything else works but KerbalX fails, a general internet outage is less likely.
Check VPN and Security Filtering
A VPN, proxy, firewall or security filter can change how your browser connects to a website.
If you are using a VPN, temporarily test KerbalX without it.
You can also check whether your security software has blocked the domain.
Do not assume that changing your IP address will fix the problem. If KerbalX itself is experiencing an outage, changing networks will not repair the underlying service.
When the KerbalX Website Is the Problem
One of the most important troubleshooting steps is knowing when to stop changing your computer.
Community reports show that KerbalX has experienced periods where users could not access the site even though their internet connections were working. A January 2023 report described an application error followed by the site becoming available again later. More recent community reports from May and July 2026 also described intermittent access problems. These are user reports rather than official outage records, so they should be treated as evidence of reported incidents rather than proof of the site’s current status.
If the same page fails:
- In multiple browsers
- On different devices
- On different networks
- For other KerbalX users
then local browser troubleshooting is unlikely to be the complete answer.
In that situation, try again later rather than repeatedly reinstalling KSP or deleting game files.
Why Does KerbalX Fail Inside KSP?
The website and the KerbalX integration inside Kerbal Space Program are related but they are not exactly the same thing.
KerbalX currently identifies Craft Manager as its official mod for craft management and KerbalX integration. Craft Manager uses KXAPI for communication with the KerbalX API.
This means you can have a situation where:
- The KerbalX website works
- KSP launches normally
- Craft Manager works locally
- KerbalX features inside Craft Manager fail
That points toward the integration layer rather than the basic KSP installation.
Check Craft Manager and KXAPI
If the error appears inside KSP, check the installed KerbalX components before reinstalling the entire game.
According to KerbalX, Craft Manager requires KXAPI to provide its KerbalX integration. The site also states that Craft Manager’s KerbalX features are optional.
Check that:
- Craft Manager is installed correctly.
- KXAPI is installed.
- Both components match the KSP version you are using.
- KerbalX integration is enabled if you need it.
- Your KerbalX account credentials are valid.
- The website itself is reachable from the same computer.
Do not replace working KSP files without first checking these dependencies.
Turn Off KerbalX Integration During an Outage
If your main goal is to play KSP and the error is coming from the KerbalX connection, you may not need to remove Craft Manager.
KerbalX states that Craft Manager can operate without its KerbalX integration. Its core craft management functions work independently, while KerbalX features such as uploading and downloading craft require the integration.
This gives you a practical temporary option.
Disable KerbalX integration and continue using the local craft management features. Turn the integration back on when KerbalX is accessible again.
This is particularly useful when the website is experiencing a temporary service problem.
What If You See a Service Unavailable Error in KSP?
A service unavailable message inside KSP can point to a connection problem between the installed mod and KerbalX.
There are historical reports of Craft Manager showing errors when KerbalX was unavailable. A Kerbal Space Program forum discussion specifically described Craft Manager or KXAPI producing an error when KerbalX was down.
Another community report described the KerbalX website showing an application error at the same time that the in-game interface reported that the service was unavailable.
If the website is also failing in your browser, focus on the website availability first.
If the website works normally but KSP still cannot connect, investigate the installed integration.
Reinstalling the Mod Is Not Always the Right First Step
Reinstalling Craft Manager or KXAPI can help when an installation is damaged or incomplete.
It is not the first thing to do when KerbalX itself is unavailable.
A useful order is:
- Open KerbalX in a browser.
- Test another browser.
- Check whether other KerbalX pages work.
- Check Craft Manager and KXAPI.
- Confirm KerbalX integration is enabled.
- Reinstall the relevant mod only if the website works but the integration remains broken.
This avoids changing several parts of a working KSP installation when the actual problem is external.
What If Only One KerbalX Craft Link Fails?
A single broken craft page should be treated differently from a complete site outage.
Try opening:
- The KerbalX homepage
- Another user’s craft
- Another craft from the same user
- A help page
If those pages work but one craft URL fails, the problem may be specific to that page or resource.
Do not assume your browser is broken simply because one saved link does not load.
KerbalX supports individual craft pages and versioned craft, so a problem with one resource does not necessarily mean that the whole service is unavailable.
Is KerbalX Still Available?
KerbalX is still accessible as a live website and its official pages currently identify the site as version 1.5.10. The service continues to provide craft sharing, help pages, Craft Manager integration and its KXAPI system.
At the same time, community reports show that users have experienced intermittent access problems.
That means an application error should not automatically be interpreted as proof that KerbalX has permanently shut down.
Frequently Asked Questions
Why am I getting the kerbalx application error?
The error can come from a temporary KerbalX service problem, a browser issue, network filtering or an issue with the KerbalX integration inside KSP. Test the website in another browser first. If multiple browsers and devices show the same problem, the issue may be outside your computer.
How do I know if KerbalX is down?
Open several unrelated KerbalX pages and test the site from another browser or connection. If multiple pages fail across different environments, a service side problem becomes more likely. Third party status services can also provide an additional signal, but they should not be treated as the only source of truth.
Why does KerbalX work in my browser but not in KSP?
KSP uses an integration layer to communicate with KerbalX. Craft Manager relies on KXAPI for KerbalX API access, so a problem with the mod, KXAPI or authentication can affect KSP even when the website itself opens normally.
Do I need Craft Manager to use KerbalX?
You can use KerbalX through its website without Craft Manager. Craft Manager adds local craft management features and optional KerbalX integration inside KSP. KerbalX identifies Craft Manager as its official replacement for the original KerbalX Mod.
Should I reinstall KSP when KerbalX shows an error?
Usually not as a first step. Check the KerbalX website, browser, Craft Manager and KXAPI before changing your KSP installation. Reinstalling the entire game is unlikely to fix a temporary KerbalX server problem.
Final Expert Concluded Solution.
A KerbalX error does not always mean something is wrong with your computer or KSP installation.
Start by separating the problem into two possibilities. If the website itself fails across browsers and devices, wait for the service to recover rather than repeatedly changing local settings. If the website works but the KSP integration fails, check Craft Manager, KXAPI, authentication and the integration setting.
KerbalX’s own documentation confirms that Craft Manager uses KXAPI for its API communication and that KerbalX integration can be disabled while the rest of Craft Manager continues working.
That distinction can save you from reinstalling working software when the actual problem is simply the KerbalX service.
