Same problem for me. Installed BMS 4.33 U2 Incremental but still no joy on the training mission TR433_09_FAILURES.
I there any place where you can download the original training mission files to copy and overwrite the existing ones?
UPDATE: Found alternative training missions here:
http://com.47df.com/dragonfighters-community/falcon-allgemein/6895-trainingseins%C3%A4tze-mit-skript/
Con: pdf readme is in German which is not a problem for me but maybe for others it is an issue. But if you follow checklists, you don’t need the pdf anyway.