ENOENT basically means “no such file or directory”. So it looks like it can’t find the sentry-cli. Do you have a file or symlink called sentry-cli at the location given in the error?
If I run yarn add sentry-expo in a new project I can find these files/symlinks afterwards:
(Note: I use yarn. If you use npm you should use npm i sentry-expo instead.)
Brilliant! clearing out node_modules and re-running yarn did it. I didn’t have that last file in your list even though i’d installed sentry-expo. I wonder why that happened. Thanks!