During a reconfigure of the installed products (or during re-attaching the database), the following messages were noticed in the NS logs after SIM failed to reconfigure:
ITMS 8.7
https://learn.microsoft.com/en-us/dotnet/csharp/language-reference/compiler-messages/cs0433
Try the following:
You will need to clear out the "Temporary ASP.NET Files" folder:
Explanation
Also verify the following:
We found that in some occasions the permissions in the machine keys directory needed to have the service account (App Identity) added instead of just having them in the administrators group:
Option 1:
Give your App Identity Full Control in NTFS security permissions to the following folder: C:\ProgramData\Microsoft\Crypto\RSA\MachineKeys
Option 2:
NOTE: If you are using the steps to swap out the APP ID account and running into this issue, add BOTH App ID accounts with Full Control to the MachineKeys folder
Also see KB 162951 - Receiving multiple errors regarding "DAL Generator failed for"