Operator ist not available in process even though extension is installed on server (TextProcessing)

Dear community,

I set up an rapidminserver to run processes on my server. While the first application ran well, the trouble began when I was working with extensions.

I installed the Web Mining as well as the Text Processing extension in my local studio as well as the server. The extension is recognized by the server and the functions are available in the server Webfrontend (see screenshot). The version of the server as well as the studio are the same (TextProcessing is 7.5 and Web Mining is 7.3).

The process that issues the problem uses Text Processing Operaors. When I start the process on the server, it seems like the server exchanges the original operator through an dummy operator because it cannot find the operator on the server (even though it is available in the webfrontend see above)

I tried to find some answers online but it seems that typically the plugin setup is the issue which has worked in my context. Do I need to active / load the plugins for a certain process? If this is the case how do I activate those?

Thank you very much for your help!