error - YAMLException incomplete explicit mapping pair

error - YAMLException: incomplete explicit mapping pair; a key node is missed; or followed by a non-tabulated empty line at line 3, column 13:
    title: Error: Circular structure in "getInit ... 
                ^
A non-serializable value was detected in an action, in the path: `register`. Value: [Function: register] 
Take a look at the logic that dispatched this action:  {
  type: 'persist/PERSIST',
  register: [Function: register],
  rehydrate: [Function: rehydrate]
} 
(See https://redux.js.org/faq/actions#why-should-type-be-a-string-or-at-least-serializable-why-should-my-action-types-be-constants) 
(To allow non-serializable values see: https://redux-toolkit.js.org/usage/usage-guide#working-with-non-serializable-data)