Error while "do-release-upgrade" from ubuntu 20.04 to 22.04

While running do-release-upgrade, I got this error:

Invalid package information 

After updating your package information, the essential package 
'ubuntu-minimal' could not be located. This may be because you have 
no official mirrors listed in your software sources, or because of 
excessive load on the mirror you are using. See /etc/apt/sources.list 
for the current list of configured software sources. 
In the case of an overloaded mirror, you may want to try the upgrade 
again later. 


Restoring original system state

Aborting
      g package lists... 3%
*** Collecting problem information

The collected information can be sent to the developers to improve the
application. This might take a few minutes.
Reading package lists... Done    
Building dependency tree          
Reading state information... Done
.
=== Command terminated with exit status 1

Any suggestions?