Design mode does not work

Dear Mendix community, after updating the project I’ve got some trouble with a screen commited by my colleague.    I can see the page in structure mode as it should be, however as soon as I’m switching to the design mode, Mendix is keeping on loading endlessly. When I deploy the project locally, the screen is displayed, however in a different way as within my colleagues project.   How it should be     How it looks like
1 answers

Seems that you changed the orientation of the form, see

The form seems to be horizontal in your version and vertical in the other version.

Why this should pose a problem in the design mode is unclear.