1. Is the time on your PC correct?
If the time is more than 1 minute apart from real time, no valid AFS-tickets can be generated.
2. Is Windows updated to the latest available version, including major "function updates"?
Some Windows sub-versions cause certain bugs when using OpenAFS, e.g. randomly refusing access to certain directories that are otherwise
accessible to you or falsely providing files in read-only mode.
3. Do you use a directory link into AFS via "Map Network Drive" (AFS-path is abbreviated by a "Drive Letter")?
This option is discontinued from OpenAFS since 2016 and can cause issues like falsely providing files in read-only mode.
Please use only links via "Add a network location" (full AFS-path without a "Drive Letter").