Hi,
I am trying to write a message from within WHMCS to a client, however if I select the option for New Message the screen goes blank. After setting to display errors it shows the following.
Fatal error: Class 'WHMCS_Token_Query' not found in /home/fyrewire/public_html/billing/admin/sendmessage.php on line 0
I have followed other suggestions of clearing browser cache, trying different browsers, also clearing the whmcs cache, setting session_name("WHMCS"); in the configuration file, reuploading the contentd of the admin folder from the 5.2.15 full zip.