Hello, please I don't know what has come over my website. If I click on any topic or boards, it redirect me to 404 error page. Please how can I solved this??
link to your forum?
redirecting to a 404 is not a standard function in SMF.
So -- either you installed the 404 mod (and misconfigured it) or you did something on the host side which is causing the host itself to not run SMF correctly.
Are you getting a generic 404 or a custom 404 (e.g. with forum branding)?