Events Calender iCal link no longer working

Does someone else have problems accessing the Events calendar from Thunderbird using the iCal-Link?
I am using webcal://community.theforeman.org/c/events/l/calendar.ics?time_zone=Europe/Berlin as it is published by the Subscribe-button on the Events page.

Thunderbird then requests the following URL, which results in a HTTP-Error 500:
https://community.theforeman.org/c/events/l/calendar.ics?time_zone=Europe/Berlin

Oh no!
I don’t have this setup, and everything is still working for me.
Anyone else with this setup that might test?

I’m using evolution and just tested it with http/https and always get a “Internal Server Error” but no more details when I refresh. So I can confirm!

When using curl I get:

<!DOCTYPE html>
<html>
<head>
  <title>Oops - Error 500</title>
  <meta http-equiv="Content-Type" content="text/html; charset=utf-8">
</head>
<body>
    <h1>Oops</h1>
    <p>The software powering this discussion forum encountered an unexpected problem. We apologize for the inconvenience.</p>
    <p>Detailed information about the error was logged, and an automatic notification generated. We'll take a look at it.</p>
    <p>No further action is necessary. However, if the error condition persists, you can provide additional detail, including steps to reproduce the error, by posting a discussion topic in the site's feedback category.</p>
</body>
</html>

So there should be some logging in Discourse about what is failing!

Looks like this is also causing the Google calendar to fail now. I tried updating discourse but it seems to still be failing. Looking at the logs, it seems there is probably some bug in the events plugin:

NameError (undefined local variable or method `local_start' for #<TZInfo::TimezoneTransition:0x00007f8ff5114bd0>
Did you mean?  local_start_at)
icalendar (2.4.1) lib/icalendar/tzinfo.rb:79:in `dtstart'
icalendar (2.4.1) lib/icalendar/tzinfo.rb:173:in `block in build_timezone'
icalendar (2.4.1) lib/icalendar/tzinfo.rb:169:in `tap'
icalendar (2.4.1) lib/icalendar/tzinfo.rb:169:in `build_timezone'
icalendar (2.4.1) lib/icalendar/tzinfo.rb:137:in `daylight'
icalendar (2.4.1) lib/icalendar/tzinfo.rb:103:in `ical_timezone'
plugins/discourse-events/controllers/list_controller_edits.rb:96:in `event_ics'
plugins/discourse-events/controllers/list_controller_edits.rb:36:in `calendar_ics'
actionpack (6.1.3.2) lib/action_controller/metal/basic_implicit_render.rb:6:in `send_action'
actionpack (6.1.3.2) lib/abstract_controller/base.rb:228:in `process_action'
actionpack (6.1.3.2) lib/action_controller/metal/rendering.rb:30:in `process_action'
actionpack (6.1.3.2) lib/abstract_controller/callbacks.rb:42:in `block in process_action'
activesupport (6.1.3.2) lib/active_support/callbacks.rb:117:in `block in run_callbacks'
app/controllers/application_controller.rb:397:in `block in with_resolved_locale'
i18n (1.8.10) lib/i18n.rb:314:in `with_locale'
app/controllers/application_controller.rb:397:in `with_resolved_locale'
activesupport (6.1.3.2) lib/active_support/callbacks.rb:126:in `block in run_callbacks'
activesupport (6.1.3.2) lib/active_support/callbacks.rb:137:in `run_callbacks'
actionpack (6.1.3.2) lib/abstract_controller/callbacks.rb:41:in `process_action'
actionpack (6.1.3.2) lib/action_controller/metal/rescue.rb:22:in `process_action'
actionpack (6.1.3.2) lib/action_controller/metal/instrumentation.rb:34:in `block in process_action'
activesupport (6.1.3.2) lib/active_support/notifications.rb:203:in `block in instrument'
activesupport (6.1.3.2) lib/active_support/notifications/instrumenter.rb:24:in `instrument'
activesupport (6.1.3.2) lib/active_support/notifications.rb:203:in `instrument'
actionpack (6.1.3.2) lib/action_controller/metal/instrumentation.rb:33:in `process_action'
actionpack (6.1.3.2) lib/action_controller/metal/params_wrapper.rb:249:in `process_action'
activerecord (6.1.3.2) lib/active_record/railties/controller_runtime.rb:27:in `process_action'
actionpack (6.1.3.2) lib/abstract_controller/base.rb:165:in `process'
actionview (6.1.3.2) lib/action_view/rendering.rb:39:in `process'
rack-mini-profiler (2.3.2) lib/mini_profiler/profiling_methods.rb:85:in `block in profile_method'


actionpack (6.1.3.2) lib/action_controller/metal.rb:190:in `dispatch'
actionpack (6.1.3.2) lib/action_controller/metal.rb:254:in `dispatch'
actionpack (6.1.3.2) lib/action_dispatch/routing/route_set.rb:50:in `dispatch'
actionpack (6.1.3.2) lib/action_dispatch/routing/route_set.rb:33:in `serve'
actionpack (6.1.3.2) lib/action_dispatch/journey/router.rb:50:in `block in serve'
actionpack (6.1.3.2) lib/action_dispatch/journey/router.rb:32:in `each'
actionpack (6.1.3.2) lib/action_dispatch/journey/router.rb:32:in `serve'
actionpack (6.1.3.2) lib/action_dispatch/routing/route_set.rb:842:in `call'
lib/middleware/omniauth_bypass_middleware.rb:71:in `call'
rack (2.2.3) lib/rack/tempfile_reaper.rb:15:in `call'
rack (2.2.3) lib/rack/conditional_get.rb:27:in `call'
rack (2.2.3) lib/rack/head.rb:12:in `call'
actionpack (6.1.3.2) lib/action_dispatch/http/permissions_policy.rb:22:in `call'
lib/content_security_policy/middleware.rb:12:in `call'
lib/middleware/anonymous_cache.rb:353:in `call'
rack (2.2.3) lib/rack/session/abstract/id.rb:266:in `context'
rack (2.2.3) lib/rack/session/abstract/id.rb:260:in `call'
actionpack (6.1.3.2) lib/action_dispatch/middleware/cookies.rb:689:in `call'
actionpack (6.1.3.2) lib/action_dispatch/middleware/callbacks.rb:27:in `block in call'
activesupport (6.1.3.2) lib/active_support/callbacks.rb:98:in `run_callbacks'
actionpack (6.1.3.2) lib/action_dispatch/middleware/callbacks.rb:26:in `call'
actionpack (6.1.3.2) lib/action_dispatch/middleware/actionable_exceptions.rb:18:in `call'
actionpack (6.1.3.2) lib/action_dispatch/middleware/debug_exceptions.rb:29:in `call'
actionpack (6.1.3.2) lib/action_dispatch/middleware/show_exceptions.rb:33:in `call'
logster (2.9.6) lib/logster/middleware/reporter.rb:43:in `call'
railties (6.1.3.2) lib/rails/rack/logger.rb:37:in `call_app'
railties (6.1.3.2) lib/rails/rack/logger.rb:28:in `call'
config/initializers/100-quiet_logger.rb:23:in `call'
config/initializers/100-silence_logger.rb:31:in `call'
actionpack (6.1.3.2) lib/action_dispatch/middleware/remote_ip.rb:81:in `call'
actionpack (6.1.3.2) lib/action_dispatch/middleware/request_id.rb:26:in `call'
lib/middleware/enforce_hostname.rb:23:in `call'
rack (2.2.3) lib/rack/method_override.rb:24:in `call'
actionpack (6.1.3.2) lib/action_dispatch/middleware/executor.rb:14:in `call'
rack (2.2.3) lib/rack/sendfile.rb:110:in `call'
actionpack (6.1.3.2) lib/action_dispatch/middleware/host_authorization.rb:92:in `call'
rack-mini-profiler (2.3.2) lib/mini_profiler/profiler.rb:249:in `call'


message_bus (3.3.6) lib/message_bus/rack/middleware.rb:61:in `call'
lib/middleware/request_tracker.rb:177:in `call'
railties (6.1.3.2) lib/rails/engine.rb:539:in `call'
railties (6.1.3.2) lib/rails/railtie.rb:207:in `public_send'
railties (6.1.3.2) lib/rails/railtie.rb:207:in `method_missing'
rack (2.2.3) lib/rack/urlmap.rb:74:in `block in call'
rack (2.2.3) lib/rack/urlmap.rb:58:in `each'
rack (2.2.3) lib/rack/urlmap.rb:58:in `call'
unicorn (6.0.0) lib/unicorn/http_server.rb:634:in `process_client'
unicorn (6.0.0) lib/unicorn/http_server.rb:732:in `worker_loop'
unicorn (6.0.0) lib/unicorn/http_server.rb:547:in `spawn_missing_workers'
unicorn (6.0.0) lib/unicorn/http_server.rb:143:in `start'
unicorn (6.0.0) bin/unicorn:128:in `<top (required)>'
vendor/bundle/ruby/2.7.0/bin/unicorn:23:in `load'
vendor/bundle/ruby/2.7.0/bin/unicorn:23:in `<main>'

Any news on this topic?

I looked around the Discourse forums at the time but didn’t see any other reports.
I will go ask now.

The Discourse events plugin that provides this is closed for comments at the moment as the dev is overwhelmed with the backlog.
I posted to Discourse general about this but didn’t get any response.
I suppose we have no choice but to hope this is updated soon.