I have a large board (390x137mm).
If I upload this board without any copper areas, then all is fine. The preview is displayed immediately.
But, if I upload the same Board with no changes but with 2 copper areas (top/bottom), then ... no preview, and the audit failed (after I placed the order manually).
It seems that something is wrong. I've tested it with a direct order (button inside EasyEDA Software), and also with exported Gerbers.
I can not do anything wrong, because all checks are ok, and the EasyEDA Software is doing his job. So, why it's working without copper areas, and way it's not working with copper areas.
Safari
13.0.4
OS X
10_14_6
EasyEDA
6.3.22