Update failed vnet repo

[Den C]

I have a high speed connection 60Mbps. Connection to internet OK. What do I do now?

===========================
Install Updates Error log
===========================
Install Updates could not fetch the package cache information lists.
Go to https://www.freecinema2022.gq/forums/ and paste the log below into a new or existing thread for assistance.

============ Log ===========

Hit:1 http://archive.canonical.com/ubuntu bionic InRelease
Hit:2 http://ppa.launchpad.net/otto-kesselgulasch/gimp/ubuntu bionic InRelease
Get:3 http://ubuntu.vnet.com.pl/ubuntu bionic InRelease
Err:3 http://ubuntu.vnet.com.pl/ubuntu bionic InRelease
  Clearsigned file isn't valid, got 'NOSPLIT' (does the network require authentication?)
Hit:4 http://ppa.launchpad.net/teejee2008/ppa/ubuntu bionic InRelease
Get:5 http://ubuntu.vnet.com.pl/ubuntu bionic-security InRelease
Err:5 http://ubuntu.vnet.com.pl/ubuntu bionic-security InRelease
  Clearsigned file isn't valid, got 'NOSPLIT' (does the network require authentication?)
Get:6 http://ubuntu.vnet.com.pl/ubuntu bionic-updates InRelease
Err:6 http://ubuntu.vnet.com.pl/ubuntu bionic-updates InRelease
  Clearsigned file isn't valid, got 'NOSPLIT' (does the network require authentication?)
Get:7 http://ubuntu.vnet.com.pl/ubuntu bionic-backports InRelease
Err:7 http://ubuntu.vnet.com.pl/ubuntu bionic-backports InRelease
  Clearsigned file isn't valid, got 'NOSPLIT' (does the network require authentication?)
Hit:8 http://mirror.unlockforus.com/linuxlite diamond InRelease
Reading package lists...
E: The repository 'http://ubuntu.vnet.com.pl/ubuntu bionic InRelease' is not signed.
E: Failed to fetch http://ubuntu.vnet.com.pl/ubuntu/dists/bionic/InRelease  Clearsigned file isn't valid, got 'NOSPLIT' (does the network require authentication?)
E: The repository 'http://ubuntu.vnet.com.pl/ubuntu bionic-security InRelease' is not signed.
E: Failed to fetch http://ubuntu.vnet.com.pl/ubuntu/dists/b.../InRelease  Clearsigned file isn't valid, got 'NOSPLIT' (does the network require authentication?)
E: Failed to fetch http://ubuntu.vnet.com.pl/ubuntu/dists/b.../InRelease  Clearsigned file isn't valid, got 'NOSPLIT' (does the network require authentication?)
E: The repository 'http://ubuntu.vnet.com.pl/ubuntu bionic-updates InRelease' is not signed.
E: Failed to fetch http://ubuntu.vnet.com.pl/ubuntu/dists/b.../InRelease  Clearsigned file isn't valid, got 'NOSPLIT' (does the network require authentication?)
E: The repository 'http://ubuntu.vnet.com.pl/ubuntu bionic-backports InRelease' is not signed.

[Valtam]

Choose a different repo other than Vnet.