The element with the click action to start/continue1 is within the navigation symbol. Symbols have their own timelines, so these actions are targeting the symbol’s version, and not the top-level scene’s timelines. The symbol version of “2-Music is” has no animations, so that’s why nothing is happening.
Because symbols can exist on multiple scenes or within other symbols, there’s no guarantee of having a specific timeline available to directly run. So to start the scene’s timeline, you have to do it a little bit indirectly using a feature called Custom Behaviors. It is basically a way to notify other parts of the document to perform an action. The steps to use this would look like:
- Exit the Symbol so you are at the Scene level
- In the Scene Inspector, click Add New Behavior in the Custom Behaviors section
- Change the name “Custom” to something like “Play 2-Music is”
- Set the action of this to Start Timeline… and select the “2-Music is” timeline
- Enter the navigation symbol and select the desired “2-music is” element
- (remove any existing actions)
- Add an On Mouse Click action that is set to Trigger Custom Behavior and enter in the custom behavior name that you set earlier, “Play 2 Music Is”
And then it should work!
1 you have both start and continue timeline actions on this element, but generally will need only one. Start will always restart a timeline, whereas the Continue will play from its current playhead position and only restart if the playhead position is at the end and the “can restart timeline” box is checked