With Debian 9 + RVM + Redmine 4.0.2 Stable

Depuis la configuration du plugin dans Redmine :

Hangouts Chat URL
Generate an "Incoming WebHook" URL from the apps configuration page on Hangouts Chat.
Aller sur Slack avec le lien suivant pour créer l'adresse URL du "Webhooks entrants" : https://slack.com/apps/build/custom-integration
OK ! I have the link.

Hangouts Chat Thread
The messages can be threaded a per-project basis by creating a project custom field named "Hangouts Chat Thread" (without quotes).
Le nom du salon cible : #my-chan

Hangouts Chat Icon
Configurer l'icône qui sera utilisée devant le message posté sur Slack.
I don't add.

Hangouts Chat Username
my-bot-redmine

Display Watchers?
Afficher les observateurs? Yes.

Post Issue Updates?
Checked

Post Wiki Updates?
NO
( If checked a bog was display from a wiki page when update and save )

Enregistrer la configuration de Redmine.
Save.

From Slack :

Depuis Slack :

Générer un "Webhooks entrants" depuis le lien https://slack.com/apps/build/custom-integration OK
-> #my-chan

Ajouter un descriptif : Nouveau message en provenance de Redmine.
Personnaliser le nom d’utilisateur : my-bot-redmine

Valider cette configuration.

Un message apparaît dans le salon #my-chan :
Utilisateur [22 h 00] a ajouté une intégration à cette chaîne : incoming-webhook
Utilisateur [22 h 10] a ajouté une intégration à cette chaîne : my-bot-redmine

Then, when i post a new issue, i see nothing to the channel #my-chan
The same ( with a bogue ) for a wiki page.

The webhook just displays an empty zone.

Is this plugin available for version 5.x?

Note that if I refresh the page, by clicking on the wiki link, the page has been updated.
If I use the save button, I have the following error :

Internal error
An error occurred on the page you were trying to access.
If you continue to experience problems please contact your Redmine administrator for assistance.If you are the Redmine administrator, check your log files for details about the error.Back

App 11590 output: plugins/redmine_hangouts_chat/lib/redmine_hangouts_chat/listener.rb:229:in speak' App 11590 output: plugins/redmine_hangouts_chat/lib/redmine_hangouts_chat/listener.rb:196:in controller_wiki_edit_after_save'
App 11590 output: lib/redmine/hook.rb:61:in block (2 levels) in call_hook' App 11590 output: lib/redmine/hook.rb:61:in each'
App 11590 output: lib/redmine/hook.rb:61:in block in call_hook' App 11590 output: lib/redmine/hook.rb:58:in tap'
App 11590 output: lib/redmine/hook.rb:58:in call_hook' App 11590 output: lib/redmine/hook.rb:91:in call_hook'
App 11590 output: app/controllers/wiki_controller.rb:179:in update' App 11590 output: lib/redmine/sudo_mode.rb:63:in sudo_mode'
App 11590 output: Started PUT "/projects/mise-en-place-d-une-coordination-interne/wiki/Wiki" for 127.0.0.1 at 2019-04-08 23:17:17 +0200
App 11590 output: Processing by WikiController#update as HTML
App 11590 output: Parameters: {"utf8"=>"✓", "authenticity_token"=>"jfAIOEbRwjkHxFIiJ91+PI3k5wbZspSEVD2tYlfbJsxmoPfhcR9fZ1F4R3pdUDQ4WK5X8jZKSq15H0GyT3dC5g==", "content"=>{"version"=>"1", "$
App 11590 output: Current user: Zer00CooL (id=1)
App 11590 output: Completed 500 Internal Server Error in 27ms (ActiveRecord: 12.0ms)

I install Redmine with RVM :
https://wiki.visionduweb.fr/index.php?title=Installer_Redmine_sur_Debian_avec_RVM

Then :

cd /opt/redmine
su - redmine
Saisir le mot de passe (redmine)
cd redmine-4.0-stable/
cd plugins/
wget https://github.com/patope/redmine-hangouts-chat/archive/master.zip
unzip master.zip
rm master.zip
cd ..

source /opt/redmine/.rvm/scripts/rvm
rvm list gemsets
rvm use gemset [email protected]
bundle install --without development test
bundle exec rake redmine:plugins:migrate RAILS_ENV=production

Redémarrer Apache2 :
sudo service apache2 restart

Le plugin apparaît bien dans la liste des plugins, et, propose un lien de configuration.

Le lien de configuration affiche une erreur 404 :
( http://domaine.ext/settings/plugin/redmine_hangouts_chat )
404
La page à laquelle vous souhaitez accéder n'existe pas ou a été supprimée.