SL360 Version incompatibility

Hi,

I have developed a course in Storyline 360 version 3.68.28887.0. I shared the source file with our client. However, they are unable to open the file because of their version which is 3.64.27845.0. As per the warning message, the feature that is causing this issue is "Feedback Theme Color". I am not even using this feature in my course. Unfortunately, the client can't update their version of Storyline due to internal IT policies. 

In the past, SL360 files used to open in SL3 with a warning message. Has SL360 become so restricted that a version 3.68.28887.0 won't open in 3.64.27845.0?

I have also attached the screenshot of the error message. Has anyone found a workaround for this?

Thank you.