Installation fails with EHOSTUNREACH of Node-Red Node

Hi everyone, since a few days I’ve got the problem, that I can not install a new pallet. Not via Node-Red nor through the config. I get the following error:

2023-02-06T18:09:27.868Z Installieren : node-red-contrib-looptimer-advanced 0.0.8

2023-02-06T18:09:27.973Z npm install --no-audit --no-update-notifier --no-fund --save --save-prefix=~ --production --engine-strict [email protected]
2023-02-06T18:09:28.528Z [err] npm
2023-02-06T18:09:28.528Z [err]  WARN 
2023-02-06T18:09:28.528Z [err] config production Use `--omit=dev` instead.
2023-02-06T18:10:48.254Z [err] npm
2023-02-06T18:10:48.255Z [err]  ERR! code EHOSTUNREACH
2023-02-06T18:10:48.255Z [err] npm ERR!
2023-02-06T18:10:48.255Z [err]  syscall connect
2023-02-06T18:10:48.255Z [err] npm ERR! 
2023-02-06T18:10:48.256Z [err] errno
2023-02-06T18:10:48.256Z [err]  EHOSTUNREACH
2023-02-06T18:10:48.264Z [err] npm ERR! request to failed, reason: connect EHOSTUNREACH 2606:4700::6810:1723:443
2023-02-06T18:10:48.270Z [err] 
2023-02-06T18:10:48.270Z [err] npm ERR! A complete log of this run can be found in:
2023-02-06T18:10:48.270Z [err] npm ERR!     /root/.npm/_logs/2023-02-06T18_09_28_492Z-debug-0.log
2023-02-06T18:10:48.290Z rc=1

I think the problem exists, since I set up Adguard as my dhcp, but I am not sure. And I don’t understand why this would be a problem, everything else is working just fine. Any help would be appreciated.