Operation couldn't be completed ... no identity found

Problem - Operation couldn’t be completed … no identity found

I need some help …
I installed on my brand new MacBook Pro the newest Versions of OSX, XCODE and XOJO (my 3rd PRO User license).
Then XCODE installed for me the Apple Certificate: iPhone Developer: Uwe Merz (…). I can find it in my keychain.
Then I was able to compile and build my “Hello World” App in XCODE and test this App on my iPad Pro.

But I cannot build Code with XOJO to upload it to my iPad device for testing :frowning:
Yes: I can select the correct Code Signing Team: (Uwe Merz) In XOJO
Yes: I set the correct Bundle Indetifier (as on my other two iMacs) in XOJO
Yes: I can test my XOJO Apps in the Simulator
NO: I cannot build an App for my mobile devices. I recieve the following error message:
The operation couldn’t be completed. EF6…EF46B2: no identity found

Help is appreciated a lot !!

are you using the appropriate version of Xcode for the version of Xojo ?

What is the iPad name ? (did yu set a name for that iPad ?)

Have you entered the license # in Xojo ?
(so you will be able to build … for iOS)

@Uwe Merz — I have had some problems with codesign utility in the past regarding my identity. Now I just use my email address as identity.