• Debian 11 is approaching its end-of-life (vendor EOL date - August 31, 2026). Plesk Obsidian 18.0.80 will be the last release to support it.
    If you are running Plesk Obsidian on Debian 11, we recommend you upgrade those servers to Debian 12 using our dist-upgrade tool.
  • We plan to deprecate and remove the support for XML RPC protocol versions earlier than 1.6.9.1 in Plesk Obsidian 18.0.82. We strongly recommend that you update all existing integrations using earlier versions of the XML RPC protocol to comply with the version 1.6.9.1 specification.

Resolved JSON.parse: unexpected non-whitespace character after JSON data at line 1 column 23643 of the JSON data

Thank you for the confirmation. Unfortunately, I am out of suggestions what might be causing the error. It will be best if you can open a ticket to our support team so they can further investigate the issue. To sign-in to support and open a ticket go to
If you got your license from a reseller, your reseller should provide support for you. If the reseller does not provide support, here is an alternative to get support directly from Plesk:
 
Had same issue with almalinux 8.10 so it is not OS related imo.
Working fine after disabling cloudflare extension, did not use it anyway
 
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