I used a search view with ajax enabled and facets. Had an error in console that source path needs to start with a slash in checkProtectedPage. The getAliasByPath was returning the absolute url. I changed that part of the code and the error was gone.
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It's likely this issue predates Contrib.social: some issue and comment data are missing.
Was getting errors trying to apply 3049350-7.patch to protected_pages version 1.7.0 rerolled the patch.
When installing patch in #12, the validation for entered path aliases fails on /admin/config/system/protected_pages/add. Input field for paths only allows /node/123 format.