Azure DevOps can't install extensions

Hi!

I can't install ADO extensions for pipelines, for instance, this one:

I get the following error (500):

INTERNAL SERVER ERROR
We encountered an error and cannot fulfill the request. The error has been traced and we will work hard to get a fix out as soon as possible. See the status message below for additional information
Tell us about this

If you would like to contact us, create a support ticket request Marketplace Team
More information about this error
GetUserAccessToken: Failed to obtain an access token of identity xxxx1111-a111-b2b2-c3c3-123456yyyyyy. AAD returned silent failure.
Additional technical details:
Activity ID: 0c13e097-714c-4be2-8d07-36be27d43192
Date and Time: 8/20/2021 7:46:16 PM (UTC)

Any ideas? Is VSTS extension site down?

thanks!

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