TheSaltShaker wrote:I'm not really sure, what caused this. The problem is, I can still add keyframes, but I cannot open their respective timeline. When i press the button for that, nothing happens. Did anyone have the same problem? Do you know how to fix it?
The general fix for any UI issues is to do Workspaces -> Reset UI.
You will then need to re-configure the UI the way you had it before, eg Dual Screen or not, Media Pool column layout, etc.
UI glitches like this are not uncommon, and Reset UI usually fixes them. If it doesn't, report back - and also state which page you're on specifically, which version you're using, and on what OS.