Todo App fails Antiforgery

[csmithson12345]

Hello,
Working in Chapter 4, near the end. 4.16/17. the "test" todo app was not working. a log on the db server said the "todo" database does not exist... (it does). but on the web app portion i get the following error.

looking for any suggestions, none of this is in my wheelhouse!

│ fail: Microsoft.AspNetCore.Antiforgery.DefaultAntiforgery[7]                                                                                                                                                                                                                 │
│       An exception was thrown while deserializing the token.                                                                                                                                                                                                                 │
│       Microsoft.AspNetCore.Antiforgery.AntiforgeryValidationException: The antiforgery token could not be decrypted.                                                                                                                                                         │
│        ---> System.Security.Cryptography.CryptographicException: The key {8c1ccb1b-6d47-4efe-aa36-4aee9b69db0c} was not found in the key ring. For more information go to http://aka.ms/dataprotectionwarning                                                                │
│          at Microsoft.AspNetCore.DataProtection.KeyManagement.KeyRingBasedDataProtector.UnprotectCore(Byte[] protectedData, Boolean allowOperationsOnRevokedKeys, UnprotectStatus& status)                                                                                   │
│          at Microsoft.AspNetCore.DataProtection.KeyManagement.KeyRingBasedDataProtector.Unprotect(Byte[] protectedData)                                                                                                                                                      │
│          at Microsoft.AspNetCore.Antiforgery.DefaultAntiforgeryTokenSerializer.Deserialize(String serializedToken)                                                                                                                                                           │
│          --- End of inner exception stack trace ---                                                                                                                                                                                                                          │
│          at Microsoft.AspNetCore.Antiforgery.DefaultAntiforgeryTokenSerializer.Deserialize(String serializedToken)                                                                                                                                                           │
│          at Microsoft.AspNetCore.Antiforgery.DefaultAntiforgery.GetCookieTokenDoesNotThrow(HttpContext httpContext)