Hi @aio welcome to the /e/ forum.
You could consider picking up the “command line” install instructions from this page https://doc.e.foundation/devices/emerald/install if you are happy that the Recovery is ok.
This is a post contains potential solution if you are a Windows user. Teracube stuck in bootloader while flashing easy installer
This is a search from the forum https://community.e.foundation/search?expanded=true&q=Teracube%20%2B%20Easy%20Installer%20order%3Alatest.