Created attachment 53315 [details] See the border If you are creating a new form wit the assistant or importing a form from an older DB the form have a border without the form design. See photo. Also the preview of the different designs don't work.
I made tests on 3.4.4 + master (3.5) updated and compiled today. 3.4.4 results : - preview : layout preview ok but color preview ko - no border at the end master : - preview : layout preview ok but color preview ok - no border at the end tested on Debian x86-32, no warning/error messages on console.
border is there because forms were wrongly opened in Print Layout, which is fixed now. *** This bug has been marked as a duplicate of bug 37024 ***