Symptoms
WP Toolkit shows blank page after 18.0.34.1 hotfix update. No errors shown in logs.
Cause
Product issue:
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#PPPM-12844 “Plesk Obsidian 18.0.34 and later behind Cloudflare with Rocket Loader enabled for a domain no longer shows empty customers’ and resellers’ pages.“
Fixed in:- Plesk Obsidian 25 March 2021 (Linux)
Resolution
Please consider updating your server:
Workaround
If update is not possible for some reason you may try the following
workaround
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Connect to the server via SSH.
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Backup the original file
/usr/local/psa/admin/plib/CommonPanel/View/Helper/Plesk.php:# mv /usr/local/psa/admin/plib/CommonPanel/View/Helper/Plesk.php{,.original}
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Download the following fixed file and replace
/usr/local/psa/admin/plib/CommonPanel/View/Helper/Plesk.phpwith it:# wget https://support.plesk.com/hc/en-us/article_attachments/360024043200/Plesk.php
# mv Plesk.php /usr/local/psa/admin/plib/CommonPanel/View/Helper/Plesk.php
with