Migration Cockpit - Direct Transfer issue: objects not generated

Good morning everyone,

We have some issues regarding the Direct Transfer options for which we tried the following always for one Company Code containing ~1000 records in the source system:

1. Created a new project with the Material object with dependents
2. Created a new project with the Material object without dependents
3. Created a new project with all migration objects (113)

Our issue is that after the object is being prepared, regardless of the 3 cases, every time we get exactly and the same 39 errors:

Also, in LTMOM we can notice that no Migration Objects are created for these Direct Transfer:

Any ideas what should we try? The RFC connections are working, we tested them via transaction SM59.

Regards,
Mădălina