Call to a member function isHidden() on null Error On Knowledgebase
After updating to version 7.2.0 or 7.2.1, an "Oops" page appears when attempting to view the knowlegebase via the client area.
When the Display Errors option is enabled, the following error details are displayed:
exception 'Whoops\Exception\ErrorException' with message 'Call to a member function isHidden() on null' in /path/to/whmcs/vendor/whmcs/whmcs-foundation/lib/Knowledgebase/Article.php:0
The issue arises when there are multi-language translations of knowledgebase articles.
A hotfix has been created which will resolve this error. It can be downloaded from: