Multiterm isn't opening imported termbase

Hi! I'm having trouble converting an Excel file (with 3 columns - English, Portuguese and Description). I've used Multiterm 2021 convert, then imported the generated file into a termbase directly on Multiterm desktop, but when I open it there are no terms available.
I've checked the videos on RWs's youtube channel but there are none from the 2021 MT version. Can anyone help me?
Thanks in advance.