Unable to share Code app with users

[Max6x6x]

Hi All,

Here is my usecase:

• I have a Production, managed environment

• i have 2 solutions:

  • Solution A: 20 custom tables, 2 security roles, 20 cloud flows (for BPF and sharepoint file management), 1 Code App developed with Claude MCP, plugins, skilss...etc
  • Solution B: 14 custom tables, 3 security roles, 14 cloud flows, 3 connection references, 1 Code app and 1 canvas app (canvas app reading and writing a couple of the tables)

• 8 users: with assigned Powerapps Premium license (and powerautomate premium licence), plus assigne "Basic user" sec role and the custom sec roles needed for one-one app.

What's the problem:

• If i open the code app (ofc) everything works properly
• if any of the users opens the code app, the "menü bar" and some of the UI elements are visible and clickable, BUT for the rest the following error pops up -> "The backend request failed with error code '400'" ..... failed to retrieve toke for source......"

What i did:

• I've deleted and reshared the app multiple times
• they created own "dataverse" connections
• i went trough a platea of setups in admin center
• i tried to "share the connection" that i created, but is on my name and says that i can share it only with a service principal.

Question: hooooooow can i make it work for the users? This is a try with code app, previously i was building a model driven on top of these and i deleted it, since the code app had mor UX/UI flexibility. back in the stone age, model driven was needing only a "share" and that the users had license, sec role and that's it.... Am i missing something?