Can't add lesson outside of schedule Message

If you are receiving a message that you "can't add lesson outside of schedule" when attempting to save, we recommend ensuring you do not have multiple windows of Planbook open at the same time as this may cause that issue. 

For information on working with two windows of Planbook open at the same time safely, please refer here - https://planbook.uservoice.com/knowledgebase/articles/1953304-how-do-i-safely-work-with-two-windows-of-planbook

If you do not have two windows open, please contact support@planbook.com. 

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