Woocomerce add product/ edit product page fail!!

Could be a caching issue. Try another browser.

If not, go to the very bottom of the page. Do you see any errors?

Yes it said at bottom

Session expired
Please log in again. The login page will open in a new window. After logging in you can close it and return to this page.

i press that link a new window pop and i logged in again and dashboard appear but nothing happen , opens same issue again ??

Have you installed any new plugins recently? Log out and restart the browser.

yes installed yith points and reward plugin but after that also no issue can be found.. this happed suddenly i deleted that plugin but same issue occurs ive also restarted my browser and tried Mozilla and opera but same issue again ??

If you disable all plugins, and it’s the same, it will be your install/host.

i ve created a full server backup last night from my cpannel..lets try to restore it.. i update to you if backup works

Thanks just disable all plugin and it work fine.. i figured it out by enabling them one by one…
these are 2 plugin which making this error
Yith compare
Yith wishlist

Don’t know why they suddenly dropped :-/