Just had a bug report from a user that ImagePickerPage wouldn’t create, so tinkering with the permissions and adding MediaIndexing seemed to solve it.
This seems like an awfully strange permission required to open the ImagePicker?
The error message I pulled from the logs without the permission was:
Error creating tracker connection: GDBus.Error:org.freedesktop.DBus.Error.ServiceUnknown: org.freedesktop.DBus.Error.ServiceUnknown