SuiteCRM Integration

Hi people,
as mentioned in this post: External CLI tools in n8n - #13 by alexhammerschmied
i was able to create a Dockerimage which installs the plugin and the dependencies. So from n8n side everything seems to work.

But I can’t get the connection to work. What am I missing? I walked through all the steps with the crm module but somehow no data gets fetched or sent to suitecrm.

Can anybody help me? Does someone know where to look or dig deeper?