A screen that should be asking a question is empty.

Turn on the Trace function to see that Corvid is actually asking the question. If there is an external source for the variable, it needs to be accessed before the question will be asked. If there is a problem in the external source, the system could be hung up on that.

If the screen shows the OK button, but no question text, check the text color that is set for the question and background. If these are set to the same color, nothing will be visible.

For the Corvid Servlet Runtime, verify the template has a CORVID_ASK section that matches that variable.