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Thanks a lot for the answer! I tried out the different RMWs but nothing seemed to work. Those things didn't fix it for me.
Instead the problem was solved by: 1. Switching to a different network. (I was on a network with extra security layers that might have messed with the communication). 2. The firewall on my two machines were blocking the communication. - As a quick fix you can disable firewall by using the following command:
sudo ufw disable
You can check the status of your firewall do typing:
sudo ufw status
It is not recommended to have your firewall disabled at all times however, so only use this as a way to test if it is the firewall that is the problem.
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