Thank you for sharing your solution.
Some feedback for other readers:
I applied the list of update by changing id with the corresponding value found in base_app table. Check the column « code » to help identifiying the id.
It solved the getEnterpiseCommunication() error.
In my case, I started from a database used with v6.0.9 and reused with v6.0.16.
Unfortunatly, upgrade is still failling after fixing app id : now I got a new error message : « Cannot invoke method getEnableAppBuilder() on null object ».