360° Video "flat" only after editing

Hi, I have a problem rendering 360° video content after editing with Karta VR and Reframe360. Both effects cause the same error. When I load a 360° file in Davinci Studio (17) and render without editing using one of the two tools, the result is a 360° video as I want it. - Perfect
But as soon as I load for example the Karta VR effect and change FOV, Pitch or whatever and render the video, I don't get a 360° video anymore but only see the viewport as a 2D video. Also injection of MetaData has no success because simply the rest of the video is not rendered.
Has anyone had a similar experience and has a solution? I have seen numerous Youtube tutorials but no one here seems to have the problem.
Many thanks for your help in advance!
But as soon as I load for example the Karta VR effect and change FOV, Pitch or whatever and render the video, I don't get a 360° video anymore but only see the viewport as a 2D video. Also injection of MetaData has no success because simply the rest of the video is not rendered.
Has anyone had a similar experience and has a solution? I have seen numerous Youtube tutorials but no one here seems to have the problem.
Many thanks for your help in advance!