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.