we use swagger, and we have a json that works perfectly with swagge (it is also written that the swagger is valid with the green sign at the bottom of the page).
But this same json, cannot be uploaded to the powerapps, it says:
An error occured while converting swagger file to WADL file. Error: 'Required property "items" is not present or not a JSON object at JSON path definitions.HundeVersicherung-typeRequest.properties.input'. Your API may not work with apps.