Your debug log shows several issues with your network configuration, notably your usage of two default gateways, two subnets and a lack of DNS resolution through Pi-hole's address.
This seems attributable to an AP setup on your Pi-hole machine and altered lighttpd's configuration, which throws some errors into the debug log as well.
Since you are running an AP alongside Pi-hole, your problems seem to be related to getting the networking side right. You'd need to sort out routing, IP forwarding and iptables rules to get this to work.
None of this would be related to Pi-hole.
You may increase your chances for a more knowledgable answer by first and also searching your chosen AP solution's documentation and forums.
To better attract attention of Pi-hole users with relevant experience here on our forums, it might help to know what guide and software you were using when setting this up.