I have installed Civi 5.51.1 over PHP7.2 and the send SMS function worked fine as it has for the past few years. However, the system complained about PHP 7.2 and said I should upgrade to PHP7.4.
After I upgraded to PHP7.4 everything seemed to be working EXCEPT send SMS action. When I try the browser just sticks with a progress indicator but never gets to the target page.
Any one else experienced this?
I am using Drupal 7.88 and Ubuntu 18.04.3