sorry we are unable to complete your call at this time zoom please try again later

Hello,

I would review the information found in this other thread which may be of assistance: https://community.zoom.com/t5/Zoom-Phone-System/quot-Sorry-we-are-unable-to-complete-your-call-at-this-time/m-p/76164/highlight/true#M3181 

The following is also a good article to understand errors you receive of this nature: https://support.zoom.com/hc/en/article?id=zm_kb&sysparm_article=KB0069786 

I hope this helps and please make sure to mark the solution as accepted if this information is what you needed.

Thank you,

Jake