Sometimes, you are trying to upload a schedule from Practice Fusion using HTML and it gives you an error.
Here's the entire process for exporting and uploading from Practice Fusion:
Here are common things to check:
1. Choose Type "Webpage, complete"
(NOT "Webpage, HTML" or "Webpage - HTML only")
Make sure on the last step, you are selecting Type = Webpage, complete. (See # 9 below)
2. Make sure you are selecting "Standard View"
as the schedule type, if that is the type of schedule you need to upload.
See # 3 in the image below.