***** This error scenario is handled with a meaningful error message in version 22.214.171.124 (and later) releases *****
If you select a custom Template (i.e. a template that you added after installing PowerWorship) and then reinstall PowerWorship without reinstalling the template (E.g. by copying it to the /Templates directory) and the template is selected in the PowerWorship settings (Edit menu > Settings) errors will result when you attempt to generate slides.
Here is the first error message that will be displayed in this situation:
Here is the second error message, which will be displayed immediately after the first:
To resolve the problem, either install the missing template, or edit the settings and select another template from the list.