Node errors. Please let's fix it together!

Hello guys!
I ran a node on Contabo server, ubuntu 20.04
Everything was installed without errors, but then I encountered a problem.

Node synchronization took to long, and then when I was checking status I got this msg:

“post failed: Post “http://localhost:26657”: dial tcp 127.0.0.1:26657: connect: connection refused”

How to fix it and where could be the problem?