I contacted Yodlee to ask why my bank's image security layer doesn't work with Zoho and vice versa. They said: "As you are aware currently Gardner Bank account is not supported by Yodlee due to security images for authentication feature at the end site, as of now we don’t have an ETA by when this site will be available. We would request you to contact Zoho Books and file a service request to Yodlee for tracking purpose."