You're very welcome, fordmar.
I hope the fix was easy and worked for you.
Enjoy your project
It sounds like the Take System is enabled, and you are not working in the Main Take.
This is often the case when an FBX is loaded and the import "alert" is clicked without reading it.
If that happens even in a new project file, please animate a cube and share that file.
So I can take a look at it.
Otherwise, please get in touch with tech support
All the best
Just testing, as someone reported this is locked.