Blcmm Invalid File Selected !!install!! -

This happens when BLCMM expects a properly formatted mod file but finds something else — for example:

The text file is not saved in UTF-8 format, which BLCMM requires. blcmm invalid file selected

For the Epic Games Store version, a similar option is available within the launcher's game settings. This process ensures that your base game is intact, which is a prerequisite for any modding to work correctly. This happens when BLCMM expects a properly formatted