If you visit mod description page on modrinth, and click the "REI" link at "About" section, you'd get an error. It seems that REI has changed their project id. (from roughly-enough-items to rei)

You might want to update the link to this: https://modrinth.com/mod/rei.

TropheusJ is currently finalizing the 0.5.1 update, so after that i think he has time.

fixed