Updating YEALINK Firmware

[agilis]

My 3CX Phone System is up to day with all current service packs.

I'm trying to update our Yealink Phones Firmware. But now I'm getting a error message. I was wondering if you guys even seen this error and know what it means.

ERROR - AN EXECPTION OCCURRED FIRMWAREFORM ERROR: THE GIVEN KEY WAS NOT PRESENT IN THE DICTIONARY.

Anyone know what key the system is talking about. Any help would be great. THANKS.

 

[3CXfoxhallsolutions]

Does this happen if you drive the firmware upgrade from 3CX, or if you do it via the phone's browser GUI?