Blank page / Error after updating due to cloudflare settings

Ok, I don’t currently use any customizations, it’s bone stock. I will certainly still try this though and see what happens.

I do use cloudflare and I set the caching to dev mode ( no caching ) and also purged all cached data to see if that would help. It did not.

Any other suggestions are appeciated, I will let you know what the results are when I try testing using safe mode later. I’m currently AFK and it takes a bit of time.