User Profile

Hello. I have an iOS app written in Xamarin, but this issue is not related to Xamarin or Visual Studio. I am trying to deploy my xamarin app onto an iOS device, but I am unable to get the iOS device to install the provisioning profile via Xcode. I work at a company with a decent variety of test devices and the result seems to be the same from iPads to iPods to iPhones of various ages. I have created a certificate and a provisioning profile. The certificate is associated with the provisioning profile on the developer portal. I have imported the certificate (including private keys) into my login keychain on MacOS. I have the .mobileprovision file downloaded to the machine. I am signed into Xcode with my apple developer account. In Xcode, i went to Window > Devices and Simulators and selected my device. I right clicked my device and selected "Show Provisioning Profiles". I clicked the plus and chose my .mobileprovision file. I get the same error on every device: Failed to install one or more provisioning profiles on the device. Please ensure the provisioning profile is configured for this device. If not, please try to generate a new profile.| this is an incredibly vague and unhelpful error. I'm not really sure what it means by "configured for this device". Not sure where to go from here