Uploading a service definition from ArcGIS Pro 2.5 (French Version) returns the following error message, "ERROR 000732: Server: the HOSTING_SERVER dataset does not exist or is not supported" . "arcpy.UploadServiceDefinition_server" function used with the "HOSTING_SERVER" parameter in the "in_server" parameter:
UploadServiceDefinition_server(in_sd_file, in_server, {in_service_name}, {in_cluster}, {in_folder_type}, {in_folder}, {in_startupType}, {in_override}, {in_my_contents}, {in_public}, {in_organization}, {in_groups})