The cause is AmbientAICallouts. Remove it if it continues to give you problems;
in addition
remove:
Backup
ComputerPlus
VocalDispatch
and update:
CalloutPack (to the version 1.1.2.0)
CountyCalls (to the version 0.5.0.0)
UltimateBackup (to the version 1.8.5.6)