Need to extract a file from image but no mount button on webui

Restore
1

I need to extract some files from the latest image backup and I saw there’s supposed to be a button to mount image backups in the webui, but the button is nowhere to be found:

https://puu.sh/yMg7K/96436fe849.png

Server running 2.1.20 on Windows Server 2k16 10.0.14393 N/A Build 14393.