Apache .htaccess Forum Fix Needed

My forum has suddenly stopped loading correctly and every sign points to a faulty .htaccess file. Nothing in that file has been touched recently, yet Apache now refuses to serve the site as expected.

I need someone who knows mod_rewrite, directory and file-level directives, and typical vHost interactions inside out. Your job is to:

• Inspect the current .htaccess, identify the mis-configuration or conflicting rule
• Adjust or rebuild the file so every forum page loads without 4xx/5xx errors
• Provide a short rundown of what was wrong and the exact lines you added, removed, or reordered

Once you confirm the fix on your end, I’ll clear the server cache and test again. Payment will be released when the forum home page and sub-threads load cleanly over both www and non-www, and no rewrite loops show up in the Apache logs.