I finally found the problem. It just related to opera’s built-in ad-blocker. when it is on, I get these errors.
thank you very much
Hello dear Mr. Osborne. Thank you for your reply.
I only encounter this problem in Opera browser. I previously used firefox and chrome but I didn’t see such an error. Now I migrated to Opera and this issue shows in this browser’s environment.
Also I’m using LScache plugin for cache.
thanks a lot
