As you contacted us via the support system in parallel and the question has been answered there already, this thread will be closed now.
To clarify for other forum users, the supplied elf file is not an executable so the error message is correct.
You have to build your application so it is an executable.
The supplied elf file is a Shared Object File instead, which might work on e.g. a fully booted Linux System, but will not work on the majority of embedded target device setups.
As Ozone is a bare metal embedded debugger such elf file types are not supported.
Keep in mind, this is *not* a support forum.
Our engineers will try to answer your questions between their projects if possible but this can be delayed by longer periods of time.
Should you be entitled to support you can contact us via our support system: segger.com/ticket/ Or you can contact us via e-mail.