403 Forbidden after 1 day, fixed temporarily by clearing cookies

[Cingozr]

I deployed the SmartStore Community version to my server and it was working fine.
However, about one day after the initial installation, when I try to log into my account, I am redirected directly to a 403 Forbidden page.

If I clear the site cookies from Chrome (DevTools → Application → Cookies), I can log in again and I am not redirected to 403. But after clearing cookies, the same problem happens again after about one day.

I couldn’t find the cause of this issue. Any idea what might be wrong?

[Cingozr]

Has anyone else encountered this issue?

[Cingozr]

??

[mgesing]

The message on the first screenshot looks like an error/error page initiated by the host. In this case, the request does not even reach the application. So you should check your host configuration to see when it returns a 403.