I checked the CS_B777-200LR-II_GE110B1 in P3Dv4.5 and it worked. This isn't really surprising since all the panel files are all used from the CS_B777-200ER-II_GE90B panel files.

All I can suggest is to use the Extended Download Service to download the csy772_1100.exe file again, and reinstalling/repairing the installation. You need to make sure that your AV, and/or Windows Defender, are OFF during both the downloading, AND the installing to be sure that they don't interfere (delete) any of the files during the download and install.

I hope that fixes you problem.

One more thing. Could it be your graphics card driver? Have you updated it recently?