How did you manage to get working ? I've got the S22U and hex installer doesn't even get passed the storage permission page. When I try to select the hex folder a blank screen shows up and nothing happens.
One UI 4.1 of course
March update
After a bit of digging I found out that it's looking for the stock files app. I was able to locate it, edit and delete it with no option at all to enable it. Even after deleting it and trying to install it again, it tells me that the package is conflicting with another apk.The newest version works ok for me. About storage permission thing - it is a different problem but I also faced it. It wants stock google files app (com.google.android.documentsui) to set the storage permission. Mine just got disabled by samsung due to it not being used. After I re enabled it everything worked.
Even went far to delete samsung's my files.
Weird!