某家電器公司想在多個 Android 應用程式內宣傳業務。不過在 Campaign Manager 360 中製作廣告活動並指派廣告素材後，系統發生錯誤。 請問造成這個錯誤的可能原因為何？

The error likely occurred because the company set the creatives to run on iOS, but they are trying to advertise within Android apps. Campaign Manager 360 requires creatives to be compatible with the specific operating system and environment where they will be displayed. Assigning an iOS-specific creative to an Android app campaign would cause an error because the creative format is incompatible with the target platform. The other options are less likely to cause an error: Assigning creatives to run on multiple mobile carriers' services is a common and supported practice. Setting creatives to run on all mobile platforms would only cause an error if the creative itself was not universally compatible, but the primary issue here is the OS mismatch. Setting HTML5 creatives to run on desktop would not cause an error when targeting Android apps, as these are distinct environments.