Every time I finish Revolutionary Fire campaign step 6 mission in Massive Assault, the game freezes, loading step 7.

Error from log file:

CURRENT MAP: islands7.map
SCRIPT: Parsing script ./scenarios/campaign/Revolution_step7.scn
SCRIPT: The script is OK
ERROR: Scenario ERROR: several units with the same ID (8)
ERROR: Scenario ERROR: several units with the same ID (36)
SCRIPT: Parsing script ./scenarios/campaign/Revolution_step7.scn
SCRIPT: The script is OK
ERROR: ERROR: Run GUI failed.
ERROR: ERROR: Mouse cheking failed.

Tried restarting mission 6, reinstalled the game, on original map and fixed with https://github.com/shaosss/MassiveAssaultScnFixer (this tool fixes "Game appear to be broken! Please restore it!" bug but not this).

Have anyone got this bug and managed to fix it?