fix FA5 icon

config/locales/server.en.yml

@@ -92,7 +92,7 @@ en:
     group_mention_template: "mentions of: @%{name}"
     group_message_template: "messages to: @%{name}"
 
-    admin_error: "Some chat integration channels have errors. Visit <a href='%{base_url}/admin/plugins/chat'>the chat integration section</a> to find out more."
+    admin_error: "Some chat integration channels have errors. Visit <a href='%{base_path}/admin/plugins/chat'>the chat integration section</a> to find out more."
 
     provider:
 

plugin.rb

@@ -29,7 +29,11 @@ after_initialize do
     DiscourseChat::Channel.find_each do |channel|
       error = true unless channel.error_key.blank?
     end
-    I18n.t("chat_integration.admin_error") if error
+
+    if error
+      base_path = Discourse.respond_to?(:base_path) ? Discourse.base_path : Discourse.base_uri
+      I18n.t("chat_integration.admin_error", base_path: base_path)
+    end
   end
 
   DiscourseChat::Provider.mount_engines