Can't update resources in Revo 2.1.3pl

Fatal error: Call to a member function addLexiconTopic() on a non-object in /httpdocs/core/cache/includes/elements/modplugin/10.include.cache.php on line 56

 <br />
<b>Strict Standards</b>:  strftime() [<a href='function.strftime'>function.strftime</a>]: It is not safe to rely on the system's timezone settings. Please use the date.timezone setting, the TZ environment variable or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected 'Europe/Berlin' for 'CET/1.0/no DST' instead in <b>/httpdocs/core/xpdo/xpdo.class.php</b> on line <b>1630</b><br />
[2012-11-27 08:18:15] (ERROR @ /httpdocs/core/xpdo/compression/xpdozip.class.php : 142) PHP warning: ZipArchive::extractTo() [<a href='ziparchive.extractto'>ziparchive.extractto</a>]: File exists
[2012-11-27 08:18:15] (ERROR @ /connectors/workspace/packages.php) Could not unpack package /httpdocs/core/packages/gallery-1.5.2-pl.transport.zip to /httpdocs/core/packages/. SIG: gallery-1.5.2-pl

<b>Strict Standards</b>:  strftime() [<a href='function.strftime'>function.strftime</a>]: It is not safe to rely on the system's timezone settings. Please use the date.timezone setting, the TZ environment variable or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected 'Europe/Berlin' for 'CET/1.0/no DST' instead in <b>/httpdocs/core/xpdo/xpdo.class.php</b> on line <b>1630</b><br />

date.timezone =  Europe/Zurich

Fatal error: Call to a member function addLexiconTopic() on a non-object in /var/www/vhosts/blablabla/httpdocs/core/cache/includes/elements/modplugin/10.include.cache.php on line 56

 $modx->controller->addLexiconTopic('gallery:tv');

 Fatal error: Call to a member function addLexiconTopic() on a non-object in /var/www/vhosts/blablabla/httpdocs/core/cache/includes/elements/modplugin/10.include.cache.php on line 56