i manage a website for a local youth organization and am suddenly not allow to enter the admin page anymore for some reason. i didnt build the website myself, but have taken over from the former person who managed it earlier this year. normally i’d log in to the admin page by simply adding “/admin” after the normal url, but all of a sudden when i do this it gives me an error instead of going to the wordpress login page.
Image of the error

after looking online for a bit i saw that it was probably the .htacces file. i havent changed anything to it so i doubt its the problem, also dont really see anything in there that would lock me out.

# BEGIN WordPress

RewriteEngine On
RewriteBase /
RewriteRule ^index\.php$ - [L]
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule . /index.php [L]

# END WordPress

I’ve also tried disabling cache, changing browsers and using incognito mode but none of these worked.

After all of this i asked help from one of my friends who is a bit better with this stuff than me, but for some reason he didnt get the error when he tried it on his pc. So after that i tried doing it on my phone using mobile data, but this also went straight to the error page.

Is it possible that somehow my phone and computer got locked out? how would this happen and can it be fixed?