Failed to set up pihole

Hello,

i tried today to set up pihole on my raspberry pi 4 with docker. I have absolutly no experience with this, so i watched a tutorial on youtube. The vid is just 4 months old. I get this error code when i try to start the docker with the pihole:

; <<>> DiG 9.10.3-P4-Debian <<>> +norecurse +retry=0 @127.0.0.1 pi.hole ; (1 server found) ;; global options: +cmd ;; connection timed out; no servers could be reached
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