I'm facing a weird permission issue with an old backup, not sure what the issue is or how to debug this kind of issue with ddev

The site was built with drupal 7 and ran with php 7.2 back in the day,

Warning: mkdir(): Permission denied in DrupalFileCache->check_filecache_directory() (line 128 of /var/www/html/melodicpixels.eu/sites/default/modules/filecache/filecache.inc). 

Selinux is set in permissive mode and i'm the owner of that path. The site does load but that warning is puzzling me