System.NotSupportedException: Unsupported log file format. Latest supported version is 9, the log file has version 14.Unsupported log file format. Latest supported version is 9, the log file has version 14.

[jonowilliams26]

Describe the bug

When running dotnet try demo and trying to execute a code block, a red block appears in the output. When using --verbose flag the console output shows System.NotSupportedException: Unsupported log file format. Latest supported version is 9, the log file has version 14.

I have tried following the steps in this issue, but it didnt fix the problem.

I have also added a global.json to the project root to make sure it was using dotnet 3.1 rather than the latest dotnet 7 installed on my machine.

{
  "sdk": {
    "version": "3.1.426"
  }
}

Did this error occur while using dotnet try or online?

• dotnet-try
• online

What kind of error was it?

• User Interface (UI): For example the output never displayed
• Service Error: For example "The service is temporarily unavailable. We are working on it"
• Other:

Screenshots

Please complete the following:

• OS
  • Windows 10
  • macOS
  • Linux (Please specify distro)
  • iOS
  • Android
• Browser
  • Chrome
  • Edge
  • Safari

[jonowilliams26]

This issue was resolved by uninstalling the .NET 5 and 7 SDK and runtimes. After they were removed and running dotnet try demo it worked without issue.