15.5.15502.6 Bug Report

[stuffuk1]

Attempting to change IPPhone to Softphone

Extensions
Phone Provisioning
3CX Client

Changing IP Phone to Softphone and OK

Results in Server 500 Error - Object not set to an instance of an object

 

[JohnS_3CX]

Hi @stuffuk1

Does this happen only on one extension or others too?

Try making a new extension and testing this again (using supported browsers: Chrome, Edge and Firefox).