Tag firing but not sending to matomo

I did a tag, I able to see the tag using the debug tool, but the event is not being sent to matomo.
Any help?

This happened to me too, and the cause of my problem was that I had changed the name of the variable holding the Matomo configuration.
When I changed the name of the Matomo configuration variable, the reference to it was lost on the tag definition.
Once I fixed this (and pushed an updated version of the Tag manager config), the tracking also worked when not in debug mode.