You noticed that upon clicking on an email hyperlink, your app gets unexpectedly shut down. This article explains why this happens and how you can solve it.
You created on your What You See Is What You Get (WYSIWYG) Editor an email hyperlink and - in order to check its functionality - you used the app and clicked on this link and observed that the app crashed and thus shut down.
This usually happens when you have selected in your WYSIWYG the Open in New Tab option.
You need to disable the 'Open in new tab' option.
On your App Dashboard, navigate to the feature where you added the email hyperlink using the WYSIWYG Editor, select the email hyperlink you have created and then click on the hyperlink button and deselect the 'Open in new tab' option.
You will be able to click on the email hyperlink link and get the option to send an email without having the app shut down.