Twitter Integration failed "Unable to register webhook"
Hey,
When trying to use the twitter integration, I get the following error: "Unable to register webhook: Unable to connect during CRC GET request. Already 1 webhooks registered. Maybe you need to delete one first.".
Thanks for the help in advance.
Now to the specs:
Infos:
- Used Zammad version: 5.0.2
- Installation method (source, package, ..): source
- Operating system: Debian 10
- Database + version: latest
- Elasticsearch version: latest
- Browser: Brave
Expected behavior:
According to the documentation, which doesn't quite match the current Twitter Developer Interface, I did all the steps like this.
I created a fresh app, enabled 3-legged OAuth and entered the keys in Zammad. In the Twitter "Dev Environments" tab, I created a label and deposited the app.
Actual behavior:
I get the following GUI error:

This is the associated log: #/var/log/zammad/production.log
E, [2021-11-20T09:52:41.346987 #11252-193300] ERROR -- : Unable to register webhook: Unable to connect during CRC GET request. Already 1 webhooks registered. Maybe you need to delete one first. (RuntimeError) lib/twitter_sync.rb:953:in `rescue in webhook_register' lib/twitter_sync.rb:944:in `webhook_register' lib/external_credential/twitter.rb:196:in `register_webhook' lib/external_credential/twitter.rb:6:in `app_verify' app/models/external_credential.rb:11:in `app_verify' app/controllers/external_credentials_controller.rb:27:in `app_verify' app/controllers/application_controller/has_download.rb:21:in `block (4 levels) in <module:HasDownload>' app/controllers/application_controller/has_download.rb:20:in `block (3 levels) in <module:HasDownload>' app/controllers/application_controller/has_download.rb:19:in `block (2 levels) in <module:HasDownload>' app/controllers/application_controller/handles_transitions.rb:16:in `handle_transaction' I, [2021-11-20T09:52:41.355299 #11252-193300] INFO -- : Completed 200 OK in 984ms (Views: 0.5ms | ActiveRecord: 9.0ms | Allocations: 19561) root@servidesk:~#
Haste version: https://haste.devstorage.eu/nxSZv6CwMV
However, there is no other webhook created in Twitter:

Twitter App Settings:

Steps to reproduce the behavior:
It is a fresh installation with mail server setup (Mailcow on a external server). Nothing else has been done yet. I used this Documentation for the installation: https://docs.zammad.org/en/latest/install/package.html
tg twit - unable webhook (((((
Unable to reproduce at the moment. Closing for now.