I had the following in my log:
“You have sinclairpaul/ha_purple_theme installed with HACS this repository has been removed, please consider removing it. Removal reason (blacklist)”
So I want to HACS and uninstalled Purple Theme.
This action then deleted my whole themes directory, so I only had access to the default theme.
I am on Home Assistant 0.109.6
Just to check, I reinstalled a snapshot to repeat the process, but the same thing happened. I’m probably doing something wrong, but just wanted to warn people!