Hello! 

Look, if add in url some Random characters on your forum https://wpforo.com/community/how-to-and-troubleshooting-2/activation-critical-error/

for example “test” https://wpforo.com/communitytest/how-to-and-troubleshooting-2/activation-critical-error/ I see 404 error (this is correct).

My forum url for example: https://www.russpuss.ru/intim/priglashayu-tebya-v-svoi-uyutnye-apartamenty-foto-moi-2/

if I’m add in my url “test” https://www.russpuss.ru/intimtest/priglashayu-tebya-v-svoi-uyutnye-apartamenty-foto-moi-2/

not available 404 page.

How to fixed it? I would like 404 error how like on your forum. 

Best Regards

Alena