you have way too many plugins, especially unsupported/ unofficial plugins. remove them all and try and get your forum working properly, then add the important ones back one by one.
you have no SMTP port. i don’t think you can have email working without it.
are you running the data volumn off an NTFS formatted USB drive? that will degrade database performance and stability.
that one plugin pointing to github without the proxy is probably going to fail in your (presumably) firewalled location if you need to have the gh-proxy in between for it to load.
i think you need either of these depending on what you are doing with certificates:
templates/web.letsencrypt.ssl.template.yml
templates/web.ssl.template.yml
this should probably commented out unless you have a specific reason for including it:
DISCOURSE_SMTP_OPENSSL_VERIFY_MODE: none