instinct 2 solar Signature check failed on file

i am tring to creat a watch app on instinct 2 solar with firmware 17.07 and to sideload it.
and i keep getting Signature check failed on file.
i am using openssl 3.6.0 to create the private key, tried sdks 4.0.4, 6.2.0, 8.3.0
i have changed the appId on each build so it will get "new registration" but nothing seems to work
thank you