Cannot login to my website

I cannot access the admin page of my site .
I will get a :
Forbidden

You don’t have permission to access /blog/wp-login.php on this server.

Additionally, a 404 Not Found error was encountered while trying to use an ErrorDocument to handle the request.
I wanted to delete the .htaccess file, but I could not find it !

My website is http://www.ohjiajun.tk/blog/

Please help me…

https://wordpress.org/plugins/all-in-one-wp-security-and-firewall/