Hi I installed and activated and registered the wpForo add ons, including private messaging. 

Its not working as intended, when I try to send a private message to another user by clicking on their account and then the pencil icon I see the 'Working' animation on the top right just stays stuck. The message seems not to send. See screenshot to demonstrate. 

I have updated my server to the latest versions of php and have updated the maximum upload size, session times, execution times, etc to maximum. 

Thank you very much for your help. I would be happy to provide access to the administrator account of the site, if necessary.