Internet Interface is up but cannot access internet

Is a fresh install where in the boot step I activated static ip with the ip
When I run ip a the correspondent network interface is given as up, but when trying to run ping it gives no network accsess as result.

I doubt very much it gives that. Educated guess - you did not configure default gateway.

And often the x.x.x.1 or x.x.x.254 is the IP of the Router…

Probably your are right, I don’t remember to have done that.

My router IP is

Can you ping the router?

I might be confused, but this thread appears to be continuation (dup) of your other thread which has a conclusion:

… yes??

yes, configuring default gateway to solved this problem.

100% not same problem, but just a continuation.