I installed Sitecore PowerShell Extensions-4.7 for Sitecore 8 and Sitecore Experience Accelerator 1.6 rev. 180103 for 9.0 on my Sitecore 9 and I got this error, this installation broke my Sitecore, I already restored and tried 3 times, and the same error pops up
“Method not found: 'Boolean Sitecore.Data.ID.Equals(Sitecore.Data.ID)'. Description: An unhandled exception occurred.
Exception Details: System.MissingMethodException: Method not found: 'Boolean Sitecore.Data.ID.Equals(Sitecore.Data.ID)'.
However, I installed the same items but on Sitecore.NET 9.0.1 (rev. 171219) And I don´t have this error
Did anyone have a similar situation?