Solved. I fixed it by changing the theme, rebuild and restart and then change the theme back to original, rebuild and restart.
Bug in Russian lang
Where i can fix this bug :
1. Right in Eng lang
2. Error in Russian lang
(-- Сообщества in Russian lang translate as Communuty but not a Categories)
"Categories" in Russian translate the same "Категории" :
and looks how translate "сообщества"
Solved by me in /language/ru/ but it is really bug.
Thank you for your interest in helping us translate NodeBB. Our translations are stored in Transifex at the link below.
Any translations or corrections you provide are very much appreciated.