Søren Hello, you will need to provide more information. What version of Spine are you using? Which runtime are you using? When exactly do you see this message?
Mario You most likely didn't match your Spine Runtimes version to your Spine Editor version from which you export. E.g. if you use Spine Editor version 3.8, our runtime must also be from the 3.8 branch on the spine-runtimes GitHub repository.
