Plesk Repair tool fails to fix File System error: bytes-like object is required, not ‘str’

Symptoms

• File System check fails under Tools & Settings > Diagnose & Repair page with the error below:

  The operation failed with the following error: {"id":1,"cmd":"plesk repair fs -n","type":"progress","message":"Checking Linux system files","level":0} {"id":2,"cmd":"plesk repair fs -n","type":"error","message":"There are incorrect permissions on some items: /var/log/plesk","level":1} {"id":3,"cmd":"plesk repair fs -n","type":"error","message":"There are incorrect permissions on some items: /opt/psa/PMM/tmp","level":1} {"id":4,"cmd":"plesk repair fs -n","type":"error","message":"There are incorrect permissions on some items: /opt/psa/PMM/rsessions","level":1} {"id":5,"cmd":"plesk repair fs -n","type":"error","message":"There are incorrect permissions on some items: /var/log/plesk/PMM","level":1}

• Trying to repair File System inconsistencies at Tools & Settings > Diagnose & Repair fails with the next error:

  0 issue(s) fixed. 0 issue(s) detected

• The following error is displayed when trying to fix permission and ownership issues with plesk repair fs tool:

  # plesk repair fs -y
  ...
  ERROR:a bytes-like object is required, not 'str'

Cause

Resolution

Workaround

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