Harmony App (Error saving page)

I am getting an error when I tried to add more Harmony activities to my Smartthings.

I get the following on the logs:

It seems that it created the activites, but I get an error when I try to save the page:

Any ideas?

If I remove the new activities, it saves the app ok.

By the way, even though it seems to create the activities, nothing is under “Things”

After 20 tries, it finally registered.