If you are getting the following error while connecting to Salesforce you will need to disable the Field level security settings for the fields. Please follow the below steps to disable field-level security settings in Salesforce.

Visit 'Setup'.

Select - Users

Search for the user and open his profile ('System Administrator' here).

Check that the 'view setup and configuration' option is enabled.

Please enable it if it is not. And reauthenticate the connection.