Error unprotecting the session cookie.The key {...} was not found in the key ring.

 .Net Core 3.0

續：Error unprotecting the session cookie.The payload was invalid. 出現了新的BUG

warn: Microsoft.AspNetCore.Session.SessionMiddleware[7]
      Error unprotecting the session cookie.
System.Security.Cryptography.CryptographicException: The key {40d34e51-8e22-41b3-a179-fe353bcd0280} was not found in the key ring.
   at Microsoft.AspNetCore.DataProtection.KeyManagement.KeyRingBasedDataProtector.UnprotectCore(Byte[] protectedData, Boolean allowOperationsOnRevokedKeys, UnprotectStatus& status)
   at Microsoft.AspNetCore.DataProtection.KeyManagement.KeyRingBasedDataProtector.DangerousUnprotect(Byte[] protectedData, Boolean ignoreRevocationErrors, Boolean& requiresMigration, Boolean& wasRevoked)
   at Microsoft.AspNetCore.DataProtection.KeyManagement.KeyRingBasedDataProtector.Unprotect(Byte[] protectedData)
   at Microsoft.AspNetCore.Session.CookieProtection.Unprotect(IDataProtector protector, String protectedText, ILogger logger)

把瀏覽器關閉再打開，就可以了。好坑的，搞一天沒搞起來。第二天莫名奇妙的好了，后來又不行，再然后發現，要關瀏覽器