Nextcloud installed, but unavailable

Hi all,

i installed yesterday on my new oDroid C2 DietPi and some optimized Software including Nextcloud, Lightpd, PiHole, Certbot and Fail2Ban.
Now my Problem is that i can’t reach my nextcloud. PiHole and my Website are avaiable, but if i want to acces nextcloud via or my browser says, this site is unavailable. If i do the same Thing on my PineA64 everything works but i use this one for other stuff.
Does anyone know why i cant reach the my Cloud?



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