Matrix field containing asset field blocks entry editing

Question

I am new to Craft CMS and am testing it. I encountered a problem.

I have a matrix field, containing an asset field. When I add this matrix field to the page field layout, then visit single entry, put something inside this asset field of the matrix field and save - things break, I can't access this entry in backend later, all that shows is this:

I have local assets source set up, and images do upload there, I can see them in assets explorer later.

When I just fill in other fields of matrix field, omitting asset field or don't use matrix field at all, things are ok.

I work on Windows, on XAMPP server.

Answer 1

Well, i found an answer. It seems it was caused by xdebug.

All fields disappearing except 'Title' after saving

Adding this to php.ini helped:

xdebug.max_nesting_level=200