Can ignored element be more than one because if i add more ignored elements it gives me this error
Hello @batch16.044
Thank you for reaching out.
Yes, it is possible to add multiple ignored elements. The error you are getting is probably because of the spaces used in the ID of the elements. Please make sure the ID name is written without spaces e.g "group1" not “group 1” both in the ignored elements field and in the element you are trying to hide. Also, please ensure that IDs are listed correctly and separated by a comma.
Please let me know if it solves your issue 
Looking forward to your reply.
I had the same error message when wanting to hide a recaptcha and found the solution to add it inside a group to be hidden instead.