Hey everyone, I found what was wrong, I had copied the relume figma kit to figma, then my wireframe, then I wanted to make some changes to the wireframe, went back to relume and then deleted the wireframes from figma and tried copying them again using the plugin, which caused the errors.
After a while I had the idea, followed the steps from 0 in a new figma page and it worked -- turns out it was the edited style guide that was causing issues, I've tried recreating this since then and its the same behaviour, so my guess is that if using the style guide, it must be unedited when importing wireframes from relume to figma, otherwise the export wont be complete.
Hope this was helpful if it's something yall havent encountered before, I'd be more than willing to help out with more info on the case if you need it! ^^