> For the complete documentation index, see [llms.txt](https://docs.wproofreader.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.wproofreader.com/v6.11.0/troubleshooting/server-side-backend.md).

# Server-side/backend

- [Application doesn't start on Windows and IIS returns 502.3](https://docs.wproofreader.com/v6.11.0/troubleshooting/server-side-backend/application-doesnt-start-on-windows-and-iis-returns-502.3.md): Fix a Windows-only startup issue in versions v5.38.0 to v6.11.0.
- ['Exception: Java heap space' record in the Logs files](https://docs.wproofreader.com/v6.11.0/troubleshooting/server-side-backend/exception-java-heap-space-record-in-the-logs-files.md)
- [How-to troubleshoot the service issues](https://docs.wproofreader.com/v6.11.0/troubleshooting/server-side-backend/how-to-troubleshoot-the-service-issues.md)
- [Common errors while configuring on-premise WebSpellChecker version](https://docs.wproofreader.com/v6.11.0/troubleshooting/server-side-backend/common-errors-while-configuring-on-premise-webspellchecker-version.md)
- [CORS policy: No 'Access-Control-Allow-Origin' header is present on the requested resource](https://docs.wproofreader.com/v6.11.0/troubleshooting/server-side-backend/cors-policy-no-access-control-allow-origin-header-is-present-on-the-requested-resource.md)
- [IIS web server option is grayed out during the installation](https://docs.wproofreader.com/v6.11.0/troubleshooting/server-side-backend/iis-web-server-option-is-grayed-out-during-the-installation.md)
- [Cannot parse ini file "...\AppServer\AppServerX.xml". Reason: XmlDomParser. Invalid token \[..\]](https://docs.wproofreader.com/v6.11.0/troubleshooting/server-side-backend/cannot-parse-ini-file-...-appserver-appserverx.xml-.-reason-xmldomparser.-invalid-token-...md)