That error is actually related to the Sangoma MCU module... If you are not using it you could try removing it but things are not supposed to break like this..
No, I don't remember seeing this... The only "crash" I had recently was with the Open Source Endpoint Manager and I was told by a FreePBX dev to remove it (I guess it's not yet compatible with FreePBX 13, he did not really give a very exhaustive answer on the subject).
Good luck and have a nice day!
Nic