Unable to solve "Error downloading photo"
A couple of days ago I started to get that white circle with the exclamation mark in the lower right corner on most of my photos in my MacBook Pro's Photos app. Since then I have been unable to download any photos from iCloud on that device.
Now, I know that many people have asked this before and I have tried various solutions from other threads, but nothing seems to work.
So far I have repaired and restored the photos library, checked in safe mode, disconnected the MacBook Pro from iCloud/Apple ID altogether, even deleted the original Photos Library file on my Mac, created a new one and "downloaded" everything again from iCloud.
Yet, the error continues to show up, with only thumbnails/low-res pictures being available across the board. I only have this problem on my MacBook Pro, everything works just fine on iCloud and all of my other devices.
Does anyone have an idea what else I could try to fix this? Thanks in advance!
PS: I am using a MacBook Pro (early 2015) with macOS Catalina 10.15.1
MacBook Pro