Hey everyone, I recently migrated my website from an Apache server to a LiteSpeed server setup. Everything seemed to go smoothly with the migration process itself.
However, I’m now running into issues with my automation tools. When I try to reconnect my Zapier and Integromat webhooks, I keep getting this error message:
Error 401: Invalid response, response must be a XML. Parsed HTML response: 401 Unauthorized. 401. Unauthorized. Proper authorization is required to access this resource! Proudly powered by LiteSpeed Technologies Inc.
The integrations were working perfectly fine on my old Apache setup, but now they’re completely broken. I’ve tried reconnecting the webhooks multiple times but the same authorization error keeps appearing.
Has anyone else experienced similar problems when switching to LiteSpeed? What could be causing this XML parsing issue and how can I resolve the authorization problems? Any help would be greatly appreciated!
This sounds like a server config issue, not LiteSpeed itself. When I moved to LiteSpeed, I found that many hosts automatically turn on stricter auth requirements and different PHP handlers that break existing API endpoints. The 401 error means your webhook endpoints now have some authentication that wasn’t there before. Check if your host changed your PHP version or enabled HTTP auth on certain directories during migration. Also make sure your webhook URLs still point to the right paths - directory structures sometimes shift during server moves. I’d test the webhook URLs directly in your browser first to see what response you get, then work backwards to figure out what auth layer got added.
litespeed has some difft rules than apache! i had issues too! maybe try adding RewriteRule ^webhook - [E=noauth:1] to your .htaccess. also check if your host set up any basic auth on those endpoints after the move. security is usually tighter on litespeed!
Had the exact same problem when I switched to LiteSpeed last year. LiteSpeed’s mod_security2 rules are way more restrictive than Apache’s defaults. It blocks webhook requests it thinks are security threats - especially POST requests with headers or payloads that automation platforms send. Check your error logs first to see which rule is blocking it. I had to whitelist Zapier’s IP ranges and tweak some mod_security rules in my .htaccess file. Also check if your host enabled extra security layers on LiteSpeed that weren’t on Apache. That XML parsing error means the webhook’s getting an HTML error page instead of the response it expects.