The ARWebAppPool can be started, but fails with the following Application Event Viewer warning:
Log Name: Application
Source: ASP.NET 4.0.30319.0
Date: 5/22/2019 11:12:13 AM
Event ID: 1309
Task Category: Web Event
Level: Warning
Keywords: Classic
User: N/A
Computer: fqdn.domain.local
Description:
Event code: 3012
Event message: An error occurred processing a web or script resource request. The resource identifier failed to decrypt.
Exception information:
Exception type: HttpException
Exception message: Unable to validate data.
at System.Web.Configuration.MachineKeySection.EncryptOrDecryptData(Boolean fEncrypt, Byte[] buf, Byte[] modifier, Int32 start, Int32 length, Boolean useValidationSymAlgo, Boolean useLegacyMode, IVType ivType, Boolean signData)
at System.Web.UI.Page.DecryptString(String s, Purpose purpose)
at System.Web.Handlers.ScriptResourceHandler.ProcessRequest(HttpContextBase context, VirtualFileReader fileReader, Action`2 logAction, Boolean validatePath)