Certificate verification error in Lftp

Today I encountered the following message while working normally with lftp:

ls: Fatal error: Certificate verification: Not trusted

It can be quickly fixed like this:

1. launch the lftp console:

   lftp
   

2. Disable certificate verification:

   set ssl:verify-certificate no
   

3. Connect to the server:

   open user@ip_address
   

In order to consolidate the material you have covered and not return to it again, create a folder ~/.lftp/

mkdir ~/.lftp/

Create a file in the folder:

nano ~/.lftp/rc

File contents:

set ssl:verify-certificate no