Exception encountered, of type "Error"<br />
[33aa01e1] /index.php?oldid=8592&amp;snapshot=1&amp;title=GromovaValueCode   Error from line 108 of /data/sites/mw4i-26/extensions/PageSnapshots/PageSnapshots.php: Call to a member function getTimestamp() on null<br />
Backtrace:<br />
#0 /data/sites/mw4i-26/includes/Hooks.php(201): PageSnapshotsExtension::start()<br />
#1 /data/sites/mw4i-26/includes/page/Article.php(595): Hooks::run()<br />
#2 /data/sites/mw4i-26/includes/actions/ViewAction.php(44): Article-&gt;view()<br />
#3 /data/sites/mw4i-26/includes/MediaWiki.php(490): ViewAction-&gt;show()<br />
#4 /data/sites/mw4i-26/includes/MediaWiki.php(287): MediaWiki-&gt;performAction()<br />
#5 /data/sites/mw4i-26/includes/MediaWiki.php(714): MediaWiki-&gt;performRequest()<br />
#6 /data/sites/mw4i-26/includes/MediaWiki.php(508): MediaWiki-&gt;main()<br />
#7 /data/sites/mw4i-26/index.php(41): MediaWiki-&gt;run()<br />
#8 {main}<br />