--ADD-------
Starting index update (additions)...
Index size before: 110
The error during cron:

Checking assignment module for additions.
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<b>Notice</b>: Undefined variable: assignment in <b>E:\Website Files\moodle\search\documents\assignment_document.php</b> on line <b>231</b><br />
<br />
<b>Notice</b>: Trying to get property of non-object in <b>E:\Website Files\moodle\search\documents\assignment_document.php</b> on line <b>231</b><br />
<br />
<b>Notice</b>: Trying to get property of non-object in <b>E:\Website Files\moodle\search\documents\assignment_document.php</b> on line <b>233</b><br />
<br />