I tried everything here, i changed my Ports but nothing worked. I use nextcloud too with apache. if i try 192.168.178.81/admin it shows only the index
Your debug log shows you configured Pi-hole to use port 80:
[webserver]
...
port = "80" ### CHANGED, default = "80o,443os,[::]:80o,[::]:443os"
But apache is using ports 80 and 8080:
[✗] tcp:*:80 is in use by apache2 (https://docs.pi-hole.net/main/prerequisites/#ports)
...
tcp:*:8080 is in use by apache2
If you want to use Pi-hole on port 80, you need to move apache from this port.
If you want to use Pi-hole in a different port, use this command to change it:
sudo pihole-FTL --config webserver.port '8880,443s'
I used ports 8880 and 443 (for https) as examples.
You can use any ports you want.
I tried some other ports too, but it doesnt work.
The website is unavailable.
[2025-04-15 19:14:51.413 CEST 1223286] Initializing HTTP server on ports "8880,443s"
[2025-04-15 19:14:51.413 CEST 1223286] cannot bind to 443s: 98 (Address in use)
[2025-04-15 19:14:51.413 CEST 1223286] Failed to setup server ports
[✗] tcp:*:443 is in use by apache2 (https://docs.pi-hole.net/main/prerequisites/#ports)
[✗] tcp:*:80 is in use by apache2 (https://docs.pi-hole.net/main/prerequisites/#ports)
Apache2 is already bound to 443, you can't bind Pi-hole to that same port. Since you didn't mark the ports as optional, FTL can not start the web interface.
Thank you, now it works after hours. 
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