By default, post integration, a test campaign will be enabled, so that the gameplay and the integration can be tested thoroughly, before pushing the game live.
v1.6.1 supports Unity WEBGL, ANDROID, EDITOR platforms. Based on the platform you had selected on Game Onboard Sheet, Spaces package will support that specific platform along with the EDITOR platform.
If you game supports multiple platforms, You will be receiving separate Spaces.Unity.WebGl.Sdk.V2.dll file for each platform. You need to use the appropriate file when building the game for that specific platform. You need to replace the Spaces.Unity.WebGl.Sdk.V2.dll file. it is present in \Spaces\Resources\ folder