I inserted a textbox.

Format Object > display = no.

I have a "more info" link with onmouseover action > display object.

Everything seems right, still get this system message: Call Method: 002_textbox Constructor Object required.

Is there a error log somewhere which explains each type of error?

Thanks.[;)]

Hi, Sebastian!

This error means that Constructor function (that should create this object) cannot create it. Unfortunately there is no additional information...
Have you set typewriter effect on this textbox? This can be the reason of error. The other reason can be using variable or property substitutions in this textbox. Just suggestions.
You can send us (support@courselab.com) example of this issue for investigation.