Feature “Website Log Check” on Plesk Obsidian 18.0.45 stops working after first log check and leads to subscriptions/domains menus showing blank page or error 500

kb: bug kb: fixed Plesk for Linux

Applicable to:

On Plesk Obsidian 18.0.45, after enabling the new feature Website Log Check and checking logs of all/multiple domains with it for the first time, menus Subscriptions > example.com or Domains > example.com starts showing a blank page. After refreshing the page in a browser the following error appears:

CONFIG_TEXT: Server Error
500 JsonException
Syntax error

Type JsonException
Message Syntax error
File WebsitesDiagnostic.php
Line 35
At the same time, the below error is logged to the /var/log/plesk/panel.log log file:

CONFIG_TEXT: ERR [panel] JsonException: Control character error, possibly incorrectly encoded
file: /usr/local/psa/admin/plib/Db/Table/Row/WebsitesDiagnostic.php
line: 35
code: 3

And the below errors are logged in the Developer's Console of the browser:

CONFIG_TEXT: StatusMessages.js:90 Uncaught (in promise) TypeError: e.map is not a function
at d (StatusMessages.js:90:19)
at Zl (react-dom.production.min.js:153:146)
at zs (react-dom.production.min.js:175:309)
at wo (react-dom.production.min.js:263:406)
at bi (react-dom.production.min.js:246:265)
at hi (react-dom.production.min.js:246:194)
at oi (react-dom.production.min.js:239:172)
at react-dom.production.min.js:123:115
at t.unstable_runWithPriority (scheduler.production.min.js:19:467)
at qa (react-dom.production.min.js:122:325)
The menu Tools & Settings > Website Log Check is also not available, it redirects to the Plesk Home page.

Product issue:

#PPPM-13639 "Opening a domain card from the Websites & Domains page no longer results in a blank screen. Previously the error occurred when the “Website Log Check” feature was manually enabled in the panel.ini file."
Fixed in:
- Plesk Obsidian 20 July 2022 (Linux)

Please consider updating your server:

If update is not possible for some reason you may try the following

workaround

Connect to the server using SSH.
Back up Plesk database.
Remove all the data from the tables WebsitesDiagnostic and WebsitesDiagnosticDomains of the Plesk database:

# plesk db "DELETE FROM WebsitesDiagnostic;"
# plesk db "DELETE FROM WebsitesDiagnosticDomains;"

To avoid re-occurrence of the issue perform one of the following:

Adjust settings in the Tools & Settings > Website Log Check menu. Run log check only for 1 domain at once, and configure automatic log check only for 1 domain or disable it.
Disable the Website Log Check feature at all by adding the following content to the panel.ini file:

CONFIG_TEXT: [websitesDiagnostic]
enabled = false