Ok great, thanks for confirming! We’ll try to solve this problem in the theme caching system, so that manual action isn’t required.
But in the meantime, for anyone else who runs into these issues:
Uncaught TypeError: Cannot read properties of null (reading ‘syscall’)
Uncaught (in promise) TypeError: Invalid value used as weak map key
Please take these steps on the console:
./launcher enter app
rails c
Discourse.clear_all_theme_cache!