hI @ladrian1610 ,

You are missing Create ACL rather than a missing Write ACL........

Key points for ACL:

Write ACL determines if a user can edit existing records.

Create ACL controls whether a user can populate fields when creating a new record...

In your case, the x.user role has a Write ACL but lacks a Create ACL. This lets them open the form and even submit but the form is read only and fields remain empty or mandatory validation can be bypassed because the form isn't truly active or editable.....

Note: You need to add a Create ACL for your custom table...

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