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Visual Studio–License validation task failed unexpectedly

Yesterday I talked about how I got into trouble after updating Visual Studio. No matter what I tried my Visual Studio instance closed after a few seconds without any error or warning. I explained how I found the root cause by activating the Activity log.

There I found the following warning:

License validation task failed unexpectedly.

What higher in the document I found a related error message:

The input is not a valid Base-64 string as it contains a non-base 64 character

I started a search on the Internet to find a solution and discovered the following article: Visual Studio 2022 crashing on startup - Microsoft Q&A

This brought me to the final solution. Here are the exact steps I took:

  • I browsed to the C:\Users\<username>\AppData\Local\Microsoft\VSCommon\OnlineLicensing\VisualStudio folder.

  • I removed both the 17.x folders.
  • Now I reopened Visual Studio. Visual Studio noticed that my license information is gone and shows me the following screen:

  • Here I clicked on the check for an updated license and signed in with my Microsoft account. After successful signing in my license file was renewed and I could continue working.

 

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