'.net6 does not have quick fix running on ubuntu 20.04

Already installed c# extensions.

Tried quick fix with dotnet core 3.1 and net 5 (both are working for quick fix) Except net 6 (asp.net webapi) having this issue. (console application works fine)

How may I fix this? Appreciate any helps.

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Solution 1:[1]

Turn out the problem was the dotnet 6.0.200. Reverting it back to dotnet 6.0.102 resolves the issue.

Sources

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Source: Stack Overflow

Solution Source
Solution 1 Standley Peter