Novice asking for advice, kneeling down for answers

I am a relatively newbie. After installing sabolg-x 2.0 today, only the homepage is displayed, and other pages are all 404 errors. Someone taught me to modify bolg/ in .htaccess. As a result, I did not find this character, so I couldn’t find it. I know how to do it, and I'm here to ask for some advice from an expert. I'd be very grateful.