Microsoft.AspNetCore.Antiforgery.AntiforgeryValidationException

[jonnyry]

This has appear in the error log a few times in live:

{
  "type": "Microsoft.AspNetCore.Antiforgery.AntiforgeryValidationException",
  "message": "The antiforgery token could not be decrypted.",
  "stacktrace": "   at Microsoft.AspNetCore.Antiforgery.DefaultAntiforgeryTokenSerializer.Deserialize(String serializedToken)\n   at Microsoft.AspNetCore.Antiforgery.DefaultAntiforgery.GetCookieTokenDoesNotThrow(HttpContext httpContext)",
  "innerException": {
    "type": "System.Security.Cryptography.CryptographicException",
    "message": "The key {a8fec002-8507-4ee1-a374-18f630320b67} was not found in the key ring.",
    "stacktrace": "   at Microsoft.AspNetCore.DataProtection.KeyManagement.KeyRingBasedDataProtector.UnprotectCore(Byte[] protectedData, Boolean allowOperationsOnRevokedKeys, UnprotectStatus& status)\n   at Microsoft.AspNetCore.DataProtection.KeyManagement.KeyRingBasedDataProtector.DangerousUnprotect(Byte[] protectedData, Boolean ignoreRevocationErrors, Boolean& requiresMigration, Boolean& wasRevoked)\n   at Microsoft.AspNetCore.DataProtection.KeyManagement.KeyRingBasedDataProtector.Unprotect(Byte[] protectedData)\n   at Microsoft.AspNetCore.Antiforgery.DefaultAntiforgeryTokenSerializer.Deserialize(String serializedToken)"
  }
}

[jonnyry]

Looks like this... https://stackoverflow.com/a/63444154