HI Jerome, do you have access to your c-panel?
Then this would be the best way to enter your site again.
1) use CPANEL file manager (or FTP) and temporarily rename this plugin’s folder.
eg, rename from
all-in-one-wp-security-and-firewall
to
tmp-all-in-one-wp-security-and-firewall
You can then login with /wp-admin console
Then change your file name in your cpanel file manager back to the original before you go on.
When you’ve entered your site, you can use the reset plugin to reset AIOWPS settings before you activate it again. Add your IP to your whitelist in your AIOWPS dashboard when you activated it. Then it should not give you hassles again.