On enquiring why I could not upload gifs this is the answer I received

"Animated Gifs have been deprecated on the whole platform.

We're always trying out new things behind the scenes at Pinterest. What you're experiencing is expected behaviour. While we can't go back to the old format, we truly appreciate your feedback on this experience and will use it when making changes in the future."

This is sad news because I have been a content creator with them for some time and the only way to get around this is to make videos of my animations, my Pinterest page is here

More information available on my new website