Uneditable element

Hello,

I'm having trouble editing the text in the second image (attachment). This is the use case: at the end of the Base layer, 6 additional slide layers appear by clicking on respective objects (as in "click on this to see that").  The trigger object is an image but there's no such text object on the stage or in the layers or anywhere... When I render the scene it appears and in the layer there's only a sound and nothing else. The animation hook cannot be selected too.

I have spent hours trying to solve it and I am going nuts with this one. Any help will be greatly appreciated. Thanks!