Rails app is running but page not loading

It did not work, but at least the error has changed:

2024-05-31T06:48:44Z runner[9185e647c107d8] ams [info]Machine started in 553ms
2024-05-31T06:48:44Z app[e824121a7511e8] bos [info][Error: EACCES: permission denied, open '/rails/app/assets/builds/tailwind.css'] {
2024-05-31T06:48:44Z app[e824121a7511e8] bos [info]  errno: -13,
2024-05-31T06:48:44Z app[e824121a7511e8] bos [info]  code: 'EACCES',
2024-05-31T06:48:44Z app[e824121a7511e8] bos [info]  syscall: 'open',
2024-05-31T06:48:44Z app[e824121a7511e8] bos [info]  path: '/rails/app/assets/builds/tailwind.css'
2024-05-31T06:48:44Z app[e824121a7511e8] bos [info]}
2024-05-31T06:48:44Z app[e824121a7511e8] bos [info]bin/rails aborted!
2024-05-31T06:48:44Z app[e824121a7511e8] bos [info]Command failed with exit 1: /usr/local/bundle/ruby/3.3.0/gems/tailwindcss-rails-2.5.0-x86_64-linux/exe/x86_64-linux/tailwindcss
2024-05-31T06:48:44Z app[e824121a7511e8] bos [info]Tasks: TOP => assets:precompile => tailwindcss:build
2024-05-31T06:48:44Z app[e824121a7511e8] bos [info](See full trace by running task with --trace)
2024-05-31T06:48:45Z app[e824121a7511e8] bos [info] INFO Main child exited normally with code: 1
2024-05-31T06:48:45Z app[e824121a7511e8] bos [info] INFO Starting clean up.
2024-05-31T06:48:45Z app[e824121a7511e8] bos [info] INFO Umounting /dev/vdc from /data
2024-05-31T06:48:45Z app[e824121a7511e8] bos [info] WARN could not unmount /rootfs: EINVAL: Invalid argument
2024-05-31T06:48:45Z app[e824121a7511e8] bos [info][    6.391956] reboot: Restarting system

If you don’t have any more advice, can you just help me understand what this person did, so I can try to replicate it?
If also that doesn’t work, I might just remove Flowbite altogether.

Thank you very much and apologies for taking so much of your time. I truly appreciate your support.