Copied from microsoft/vscode#115940 (comment):

I can see the list of PRs but clicking on the dropdown shows nothing.

Extension output is as follows:

[Info] Failed to get pull request review comments: Error: GraphQL error: Field 'path' doesn't exist on type 'PullRequestReviewThread'
GraphQL error: Field 'isOutdated' doesn't exist on type 'PullRequestReviewThread'
[Info] Error: GraphQL error: Field 'viewerViewedState' doesn't exist on type 'PullRequestChangedFile'
[Info] Failed to get pull request review comments: Error: GraphQL error: Field 'path' doesn't exist on type 'PullRequestReviewThread'
GraphQL error: Field 'isOutdated' doesn't exist on type 'PullRequestReviewThread'
[Info] Error: GraphQL error: Field 'viewerViewedState' doesn't exist on type 'PullRequestChangedFile'
[Info] Failed to get pull request review comments: Error: GraphQL error: Field 'path' doesn't exist on type 'PullRequestReviewThread'
GraphQL error: Field 'isOutdated' doesn't exist on type 'PullRequestReviewThread'
[Info] Error: GraphQL error: Field 'viewerViewedState' doesn't exist on type 'PullRequestChangedFile'

Github Authentification Output:

[Info  - 09:22:45.590] Getting user info...
[Info  - 09:22:46.204] Got account info!

Enterprise version is: v2.22.4

@kabel do you know why the above errors are happening? Is GHEP now out of sync with the extension again?

Copied from microsoft/vscode#115940 (comment):

I had similar errors on our GHE instance. Based on the change log, these fields were introduced on 2020-09-23. I guess you have to upgrade the GHE to a version after that.