Outgoing connections fail

Hello,

i am pretty new to hass.io and i rly need someones help now.

I get these errors (i cant paste links here somehow, so i made screenshots)

I copied the darkskyi url to my browser and i got a bunch of information back. So i guess that part is okay. Maybe it cant resolve the url?! I set up a static ip (for my hass.io running on a rasp 3b) entered the ip address of my rasp as dns server (Running pi-hole) and the one of my router second. So it should be able to resolve the url.

Besides that i get two other errors, which could be caused by the same problem.

I hope someone can help me with that issue.
Thanks in advance
Christian!