Pros: no change to NodeBB source, so that I can update NodeBB as new release comes.
Cons: The link URL is ugly and can not be copied for quote.
Thank you very much @PitaJ . now it is ok. but i remember that i had same problem two days ago after configure ngnix and config. site was good also i entered some categories and soon suddenly i got above errors. i hope it wont give error again.