@baris Thank you so much. Caught in the installing process didn't saw that. Now I have a working NodeBB site. For the first test install used everything as is in the tutorial so database is nodebb.
11/5 22:06 [2132] - [31merror[39m: /category/95.rss
Error: Błędne ID Kategorii
at async.waterfall.category.topics (/root/nodebb/src/categories.js:35:18)
at fn (/root/nodebb/node_modules/async/lib/async.js:746:34)
at /root/nodebb/node_modules/async/lib/async.js:1213:16
at /root/nodebb/node_modules/async/lib/async.js:166:37
at /root/nodebb/node_modules/async/lib/async.js:706:43
at /root/nodebb/node_modules/async/lib/async.js:167:37
at /root/nodebb/node_modules/async/lib/async.js:1209:30
at /root/nodebb/src/categories.js:168:4
at /root/nodebb/node_modules/async/lib/async.js:726:13
at /root/nodebb/node_modules/async/lib/async.js:52:16
at done (/root/nodebb/node_modules/async/lib/async.js:246:17)
at /root/nodebb/node_modules/async/lib/async.js:44:16
at /root/nodebb/node_modules/async/lib/async.js:723:17
at /root/nodebb/node_modules/async/lib/async.js:167:37
at /root/nodebb/src/categories.js:234:4
at /root/nodebb/node_modules/async/lib/async.js:52:16