Interesting development!
The bug is back. Yesterday everything worked just fine, but today I got the same error:
Error: ScriptLoader PRO v1.25: Error by executing script(s): mod_vehicle_exp.pyc mod_crew_info.pyc mod_autoaim_indicator.pyc Check Python Logfile for detailed Informations [ C:/Games/World_of_Tanks/Python.log ]
python.log
edit: I found the culprit: I have been using the Stardock utility "CPU-Cores" to squeeze a few more fps out of the game, but when I launch WoT without this utility, the modpack works just fine.
So you can put this utility on your list of incompatible apps.