Can no longer modify animation + animation bugged

I have one of the elements of my scene for which I can no longer modify the “location” animation… and some of it no longer plays as it should…

You can see in the attached that I can no longer drag / move the red forklift element… whereas I can move the yellow one. It suddenly happened and I cannot seem to fix it.
I tried to copy the element and the location animation but it results in the same: a locked element.
Are you familiar with this issue?
Is there a way I can solve it?

AS you can see once I select the red forklift - I’m stuck with it… I cannot select anything else or move anything until I select another element from the timeline list… weird.

Hi Michael,

Thanks for contacting us.

Could you please share your project package which has the issue to so that we can analyze further?

Kind regards,