You may see an error message telling
The file is not compatible with this application version
This happens most likely when you are trying to load a Kameleo v1.9.7 profile to Kameleo v2. Please note that this is not possible.
If you would like to import your older profiles to Kameleo v2, you can do it with migrate the cookies: How to migrate profiles from v1.9.7 to v2?
If you are trying to load a Kameleo v2 profile and you still see this error message, you can open a support ticket. Please include your .kameleo file in your ticket.