Could not start call with client

I could not start the call with the client. They were in the waiting room, I could get the “ Start Call” button but no amount of clicking started the connection. I even switched to a different computer and it still didn’t work. We ended up having the session on FaceTime. Has anyone else had this issue and found a fix? I am hearing here that some waiting room problems were related to Google Chrome, and there was also a reference to “Firefox problems” (?) so wondering what browsers people recommend. What’s left? Internet Explorer?

This happens to me on an android (chrome) tablet. All buttons responsive to clicking except the start call button and no response from doxy since I reported it. Works fine on my laptop and android phone.