Unable to access domain's Files page in Plesk: cannot read properties of undefined (reading 'state')

Symptoms

• Unable to access Domains > example.com > Files page, the process fails with one of the errors:

  cannot read properties of undefined (reading 'state')

  t.data is undefined

• The execution of the command below fails:

  "%plesk_dir%\bin\repair.exe" --repair-webspace-system-users -webspace-name example.com
  ...........
  Checking and restoring users for the domain example.com
  Updating system user johndoe ................................... [FAILED]
  - Unable to execute usermng: User 'johndoe' doesn't exist.

• At the same time the user johndoe exists in Windows Local Users and Groups > Users

Cause

Subscription's system user corrupted.

Resolution

1. Log into the server via RDP.

2. Start a command prompt as an Administrator.

3. Execute the command below to open Windows Local Users and Groups

   lusrmgr.msc

4. Go to Users page and remove johndoe user.

5. Run the command to re-create johndoe user by executing the command:

   "%plesk_dir%\bin\repair.exe" --repair-webspace-system-users -webspace-name example.com

6. Set the correct permissions for files and folders within example.com subscription:

   "%plesk_dir%\bin\repair.exe" --repair-webspace-security -webspace-name example.com