# Troubleshooting

> Solve problems with TX Text Control .NET Server: packages and licenses, the Document Editor connection, Linux, Docker, IIS, Azure, fonts and conversions.

- **Product:** TX Text Control .NET Server
- **Section:** Documentation
- **Kind:** Topic
- **Path:** TX Text Control .NET Server > Troubleshooting
- **Web URL:** https://docs.textcontrol.com/tx-text-control-dotnet-server/troubleshooting/
- **LLMs URL:** https://docs.textcontrol.com/tx-text-control-dotnet-server/troubleshooting/llms.txt
- **LLMs-Full URL:** https://docs.textcontrol.com/tx-text-control-dotnet-server/troubleshooting/llms-full.txt

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## On This Page

- [Find the Right Page](https://docs.textcontrol.com/tx-text-control-dotnet-server/troubleshooting/#find-the-right-page)
- [Collect the Evidence First](https://docs.textcontrol.com/tx-text-control-dotnet-server/troubleshooting/#collect-the-evidence-first)
- [Where to Start](https://docs.textcontrol.com/tx-text-control-dotnet-server/troubleshooting/#where-to-start)

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## In This Section

- [Azure](https://docs.textcontrol.com/tx-text-control-dotnet-server/troubleshooting/azure/llms.txt): Fix problems on Azure App Service: Web sockets off, 32-bit platform, target runtime, the Windows sandbox, the Free tier, session affinity and fonts on Linux.
- [Document Conversion](https://docs.textcontrol.com/tx-text-control-dotnet-server/troubleshooting/conversion/llms.txt): Solve conversion errors with ServerTextControl: FilterException reasons, wrong StreamType, protected PDFs, PDFs without text, missing images and DOC on Core.
- [Docker](https://docs.textcontrol.com/tx-text-control-dotnet-server/troubleshooting/docker/llms.txt): Fix container problems: base images and gconv, fonts in the image, restoring from the private feed in docker build, ports and a backend in another container.
- [Document Editor](https://docs.textcontrol.com/tx-text-control-dotnet-server/troubleshooting/document-editor/llms.txt): Fix Document Editor errors in ASP.NET Core, Angular, React and Blazor: no height, TXTextControl.init errors, an editor already initialized and early API calls.
- [Fonts](https://docs.textcontrol.com/tx-text-control-dotnet-server/troubleshooting/fonts/llms.txt): Fix font problems: replaced fonts, the Fonts folder of the Core engine, a failed font installation, AdaptFont, fonts in PDF/A, the editor and the viewer.
- [IIS](https://docs.textcontrol.com/tx-text-control-dotnet-server/troubleshooting/iis/llms.txt): Fix IIS problems with TX Text Control .NET Server: error 500.30, 32-bit pools, the WebSocket Protocol, idle time-outs, recycling, sub-applications and fonts.
- [Installation](https://docs.textcontrol.com/tx-text-control-dotnet-server/troubleshooting/installation/llms.txt): Fix installation errors of TX Text Control .NET Server: SDK packages not found, missing sources, target frameworks, mixed versions, NETSDK1082, ERESOLVE.
- [Licensing](https://docs.textcontrol.com/tx-text-control-dotnet-server/troubleshooting/licensing/llms.txt): Fix license problems of TX Text Control .NET Server: trial text in documents, an expired trial, controls that could not be licensed and LicenseLevelException.
- [Linux](https://docs.textcontrol.com/tx-text-control-dotnet-server/troubleshooting/linux/llms.txt): Fix Linux problems: the Classic package, glibc and gconv modules, ICU, the dotnet command, the working directory, permissions and case-sensitive file names.
- [Native Library / Runtime Errors](https://docs.textcontrol.com/tx-text-control-dotnet-server/troubleshooting/native-libraries/llms.txt): Fix startup errors of TX Text Control .NET Server: 32-bit processes, ARM64 and Alpine, Classic outside Windows, missing runtimes and Create returning false.
- [NuGet Authentication](https://docs.textcontrol.com/tx-text-control-dotnet-server/troubleshooting/nuget-authentication/llms.txt): Solve problems with the Text Control Private NuGet Feed: 401 responses, expired API tokens, missing packages, an ignored nuget.config and build servers.
- [WebSockets](https://docs.textcontrol.com/tx-text-control-dotnet-server/troubleshooting/websockets/llms.txt): Fix Document Editor connection problems: pipeline order, the middleware, the backend port 4283, rejected handshakes, proxies, WebSocket URLs and reconnection.

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## Nearby

- **Previous:** [Performance Best Practices](https://docs.textcontrol.com/tx-text-control-dotnet-server/performance/best-practices/llms.txt)
- **Next:** [Installation](https://docs.textcontrol.com/tx-text-control-dotnet-server/troubleshooting/installation/llms.txt)