I have only had this problem once, and after I deleted all my unused cache files and restarted my computer, the project started working fine again. I used to use a 2016 Macbook Pro, and never had a lot of issues. Recently I got a new MacBook Pro 2019 (specs attached bellow) and since then I have been having so many issues with Creative Cloud.
I am currently edding a showreel. Until yesterday, everything was working fine, but today, when I tried to open up my project, it gave me this message: "Sorry, A Serious Problem has occurred that requires Adobe Premiere Pro to shut down." I tried to restart, nothing worked. I don't even have enough time to copy the timeline into a separate project, because this message box comes up, almost immidietly. Some other sequences work fine, but ones with additional graphics, give me this issue. One sequence with a simple title animation, gives me the same issue. I don't know what to do, HELP!!
I am using the most updated vesion of Premiere Pro. The sequence has title graphics imported from the newest verion of After Effects. Another set of titles that I took from Adobe Stock.
Crash, Editing, Freeze or hang, How to, Performance