You should be able to add widgets to your footer in two ways:
Via :
1. Dashboard-> Appearance->widgets menu https://prnt.sc/rz3wsb
and also from the Customizer.
( Customizing-> Widgets).https://prnt.sc/rz3w10
Add each widget to a separate column (Footer Widget 1,2,3 … 6).
Both options should work fine.
Can you give me the address to your website?