Time remapping stopped working for some reason, it's just greyed out.

Hello!

Noob here trying to time remap and it was no problem when I tried doing it a few months ago but when I started Premiere Pro today it doesnt work anymore.
When I'm right clicking the fx-icon -> time remapping -> speed the fx icon turns yellow and a thick, non-moveable white line is placed at the bottom of the clip. Not in the middle as it used to.
I also can't do it via the effect window because the percentage is greyed out. I can add keyframes though... 
And I have "Show video keyframes" enabled in the timeline settings.

I've attached a few pictures that hopefully explains my problem.

I'm pretty sure its just me who is doing something wrong but I can't figure out what...

Premiere Pro 23.3.0
Win 10



I've tried to search around for a solution but can't find anything more than a bug that was fixed about 3 years ago