Sometimes I you try to clear file metadata cache I get this error.
After an investigate I found that it happens because sometimes a dir path is returned as dir/path, instead of dir/path/ (ending with a slash), which _s3fs_refresh_cache() expects
Closed: outdated
2.13
Code
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It's likely this issue predates Contrib.social: some issue and comment data are missing.
Drupal 7 end-of-life triage:
Drupal 7 reached end of life on January 5th.
The 7.x branches of S3FS do not have any additional planned releases.
The requests in this issue do not appear to exist in the 8.x-3.x and newer branches.