Hey, I'm migrating my Odoo service EE Odoo 14 to Odoo 17. I'm testing the 17 community version. However, I cannot install personalized modules due to the following error:

ValueError: External ID not found in the system: web.assets_backend

I have followed previous forum suggestions, also made on SO. However, I cannot get it to work. Seems to me that a paid module is necessary particularly the web_studio one from the Odoo17 store.

Is this true or any ideas on how to solve the issue? I have changed the manifest, no typos, my path to files is ok.