Whenever I try to install a new build from testflight I get this error "Could not install [appname]. Your request couldn't be completed. Try again". Deleted the whole app and started again but nothing seems to work. No occured when compiling the app during development locally.
"Your request couldn't be completed" when trying to install a new build from testflight
any update ?
This happened to me and the reason turned out to be that the app was still "Waiting for Review." One quick solution is to add a an "Internal Testing" group through app store connect.
It worked for me!