[SOLVED] Not able to mark activities as Done - by: iconic

I upgraded our php version to the latest being 7.3 and since that has happened me and my staff are not able to change the status of an activity to Done. We click on the dropdown box option and nothing works. It just returns to Done.

I am currently using version 8.3.2 for projeqtor.

Here is a video to show you what I mean.

It happens with all profiles including the administrators account.