Similar issue. Launched FH2 just fine for years (decades really). Was very happy to see the CMP updater integrated because the standalone never worked for me, always froze. This time it worked using the integrated FH2 official launcher and I played as normal just fine, including CMP maps for a week.
Suddenly, today, FH2 launcher throws up and error about strings missing, etc (didn't screenshot it) and its gibberish to me. Won't launch. I reinstalled the launcher and am able to launch now, but like mentioned above there's no CMP integration any longer.