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When accessing support tickets or areas of WHMCS with file attachments, you may encounter a TypeError: Return value of convertIniSize() must be of the type int Error, float returned
error message:
TypeError: Return value of convertIniSize() must be of the type int Error, float returned in /path/to/whmcs/includes/functions.php
Cause
The PHP configuration that WHMCS uses contains an invalid post_max_size
value.
You may be able to review the current value within WHMCS at Utilities > PHP Information.
Solution
Edit the applicable php.ini
file on your server to specify a valid post_max_size
value. For more information, see PHP's configuration documentation.
After you configure a valid value, the error will resolve immediately.
You may need to contact your system administrator or hosting provider for help making this server PHP configuration change.