Deploying an experimental instance in 17.12 results in a compatibility version error on STJ when opening the PM UI

[martinrrm]

Since VS 17.13 upgraded System.Text.Json (STJ) to 8.0.5 if you deploy an experimental instance using latest NuGet.Client code in 17.12 (and I believe older) you will have an error when opening the PM UI, looking at the error message I see that it's unable to get 8.0.5 STJ.

I believe that we need to update our dependencies to use 8.0.4 if the VS build version is older than 17.13

[donnie-msft]

Please add the full build number and a screenshot of the error for future reference.

[martinrrm]

There isn't a specific build number for this, any version of VS lower than 17.13.
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