[BUG] Picture assets not loading, Mac OS 11.4

Pictures of achievements, profile and map previews are not loading correctly, displaying purple frames instead. DNS/connection/files are fine and have been checked. These issues do not exist in 10.14.

Problem occurs with Mac OS 11.4 (20F71), 20.5.0 Darwin Kernel Version 20.5.0: Sat May 8 05:10:33 PDT 2021; root:xnu-7195.121.3~9/RELEASE_X86_64 x86_64

I thought I saw something about this in the Mac Technical Support, and I think this is it:

Hi,
I have the same problem.
The MAP-Preview icons are gone, too.
I have a iMac: 3,2 GHz 6-Core Intel Core i7, Radeon Pro Vega 20 4 GB, 16 GB 2667 MHz DDR4