Embedding Zen Planner's iframes on Wix requires adding additional Approved Sites within Zen Planner.
Navigate to Setup>Sharing & Embedding>Approved Sites within your Zen Planner Database. Next, add the following Approved Sites:
https://www-yourdomain-com.usrfiles.com as well as https://www-yourdomain-com.filesusr.com
For example, if my website is https://www.getfitwithjosh123.com, I would add the following URLs to Approved Sites in Zen Planner: https://www-getfitwithjosh123-com.usrfiles.com and https://www-getfitwithjosh123-com.fileusr.com. Once added, the iframes should now appear on your Wix website correctly!
If you need further guidance on this process, feel free to reach our Support Team at firstname.lastname@example.org and 866-541-3570!