Plesk intermittently provides error when opening different pages: Syntax Error: Unexpected token '<' "<!DOCTYPE> " is not valid JSON

Vladimir Levchuk

Updated May 01, 2024 18:03

kb: technical Plesk Obsidian for Windows

Symptoms

Intermittent error in Plesk when opening different pages: Syntax Error: Unexpected token '<' "<!DOCTYPE> " is not valid JSON

Sometimes the following error also could be shown: ApolloError: Response not successful: Recieved status code 500

There are no related records in %plesk_dir%admin\logs\php_error.log log file.
All Plesk components are up-to-date and there are no corrupted files. Checks with Plesk Reconfiguratior are passed successfully.

Some pending Windows updates require the server to be restarted.

Restart the server.

1 comment

Gianluca Del Bianco
November 28, 2024 14:48

This also happens on Plesk Linux.

0

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