Black clips and and yellow triangle in FCP 11

When I open a library made with 10.8.1 in FCP 11 videoclips that in 100 fps is black. Other frame rates as 25p or 50p is fine.

When I open a a new FCP11 library and import a 100 fps clip to a yellow triangle shows up and it says, "the video frame rate exceeds you display's maximum playback rate att 60 fps" but it seems to work though.

Tested on 3 different MacBook Air M1, M2 and M3 with Sequia.

It's filmed with Panasonic GH6. I've been forced to revert to FCP10 where everything is fine.