Ok, so it's not passing in the start date. Find out where that's being called from and see if you can trace the call from there. Also, it's a notice error, so you can probably just hide it. Does the thing you're trying to do actually work, though? There's also this...
<p style="font-size: 16px; color: #001B6B">Unauthorized access - Invalid Permissions.</p>
Check the permissions of your files