How to solve the problem with In-App Purchase in Unity3D 2018.3?

Question

Android

Hello!
When using In-App Purchase in Unity3D 2018.3 and testing the game in the development environment everything works fine, but when used on a real device, the window for paying for purchases is not displayed! The following error is displayed in the console:

System.Exception: Error: called non-existent method System.Boolean UnityEngine.VR.VRSettings::get_enabled()

On the developer's site, I found that this problem was fixed in the latest versions of the plugin, but I can not update it. How can I fix the error myself? Thank you.

[AssemblyUpdater] Type reference 'UnityEngine.VR.VRSettings' replaced with 'UnityEngine.XR.XRSettings' as the declaring type of 'System.Boolean UnityEngine.VR.VRSettings::get_enabled()' in 'System.Void UnityEngine.Purchasing. GooglePlayAndroidJavaStore::purchase(System.String,System.String) {IL_0026: call System.Boolean UnityEngine.VR.VRSettings::get_enabled()}'.

Answer 1

there, in fact, everywhere they write to try to install the unit so that there are no spaces in the path.
and the project as well) to be sure)
delete, re-import IAP. and that look will pass) but in general they promised that they will fix it in Unity2019 or have already fixed it)))