Editing view of the startpage shows only a white side.

Hello dear Enfold Team,

I have a current WordPress and the current Enfold version on the server.
All pages can be edited, except the start page.
There, in the editing view, since the last editing step,
only one white side is shown.
May the cause be the memory limit (currently limited to 64 MB by webhoster)?
The start page is the largest page of the homepage and uses the extended editor.
Thank you for tips.

Regards

Martin