这里也有同样的问题，升级失败并导致论坛出现 500 错误。老实说，我相当惊讶这个问题已经持续了 3 天。
无论如何，我现在正在运行 CLI 重建，希望它能成功。如果不行，我先拍了 VM 快照，因为我妈妈没生出傻瓜。
从 这篇文章 来看，他们将 ruby 升级到了 3.0，这完全破坏了 Web 升级。不幸的是，软件仍然允许用户尝试，然后你就会看到你的主机能多快地提供 HTTP 500 错误。
编辑：CLI 重建确实成功了，谢天谢地！
相关错误：
Fetching gem metadata from https://rubygems.org/.........
Fetching https://github.com/rails/sprockets
web-push-3.0.0 需要 ruby 版本 >= 3.0，这与当前版本 2.7.6 不兼容
Docker Manager: 升级失败
#<RuntimeError: RuntimeError>
/var/www/discourse/plugins/docker_manager/lib/docker_manager/upgrader.rb:209:in `run'
/var/www/discourse/plugins/docker_manager/lib/docker_manager/upgrader.rb:93:in `upgrade'
/var/www/discourse/plugins/docker_manager/scripts/docker_manager_upgrade.rb:19:in `block in <main>'
/var/www/discourse/vendor/bundle/ruby/2.7.0/gems/activesupport-7.0.3.1/lib/active_support/fork_tracker.rb:20:in `block in fork'
/var/www/discourse/vendor/bundle/ruby/2.7.0/gems/activesupport-7.0.3.1/lib/active_support/fork_tracker.rb:18:in `fork'
/var/www/discourse/vendor/bundle/ruby/2.7.0/gems/activesupport-7.0.3.1/lib/active_support/fork_tracker.rb:18:in `fork'
/var/www/discourse/plugins/docker_manager/scripts/docker_manager_upgrade.rb:6:in `<main>'
/var/www/discourse/vendor/bundle/ruby/2.7.0/gems/railties-7.0.3.1/lib/rails/commands/runner/runner_command.rb:43:in `load'
/var/www/discourse/vendor/bundle/ruby/2.7.0/gems/railties-7.0.3.1/lib/rails/commands/runner/runner_command.rb:43:in `perform'
/var/www/discourse/vendor/bundle/ruby/2.7.0/gems/thor-1.2.1/lib/thor/command.rb:27:in `run'
/var/www/discourse/vendor/bundle/ruby/2.7.0/gems/thor-1.2.1/lib/thor/invocation.rb:127:in `invoke_command'
/var/www/discourse/vendor/bundle/ruby/2.7.0/gems/thor-1.2.1/lib/thor.rb:392:in `dispatch'
/var/www/discourse/vendor/bundle/ruby/2.7.0/gems/railties-7.0.3.1/lib/rails/command/base.rb:87:in `perform'
/var/www/discourse/vendor/bundle/ruby/2.7.0/gems/railties-7.0.3.1/lib/rails/command.rb:48:in `invoke'
/var/www/discourse/vendor/bundle/ruby/2.7.0/gems/railties-7.0.3.1/lib/rails/commands.rb:18:in `<main>'
/var/www/discourse/vendor/bundle/ruby/2.7.0/gems/bootsnap-1.15.0/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:32:in `require'
/var/www/discourse/vendor/bundle/ruby/2.7.0/gems/bootsnap-1.15.0/lib/bootsnap/load_path_cache/core_ext/kernel_require.rb:32:in `require'
bin/rails:18:in `<main>'