You posted it in post 6 in the htaccess file.
Try the two below see what one works

I'm very thankful to you for your precious time.

I have tried both .htaccess files. But getting same 404 error on each categories.

Also, I have noticed that whenever I put domain.com/forums/forums/ then each and everything starts working.
For example
This link is showing 404 error: http://libretro.com/forums/7-RetroAr...post&order=asc

But this link is working fine :O :
http://libretro.com/forums/forums/7-...post&order=asc


--AB

Do you have all your files in a folder called forums in your FTP and in admincp/settings/options/ URL settings what have you put for your URL

Yes I do have all the forum files in folder forums.

and I'm using http://libretro.com/forums in URL settings as well.

You would be best to get support to have a quick look at your board to see what the problem is or post in paid section. Try this one last thing to see if it is a plugin causing a problem.
Disable plugins via config if this fixes the problem enable plugins again via config, then disable one plugin at a time until you find the problem one

To temporarily disable the plugin system, edit includes/config.php and add this line right under <?php

To enable plugins again just comment out the line
Use notepad++ to edit any files

Hi Basit Kingz or aka
https://www.fiverr.com/coder112

Sir please guide. I'm noob.

I have canceled our order. Clearly you are not qualified to fill my order to fix the err.
Yes I can google

Thank you ForceHSS for your time to try to fix the issue. I will try the paid section.

I also thank you for rm -rf my forums dir due to some fit you had.