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https://forums.modx.com/thread/76613/unknown-e-notice-error#dis-post-423745
Error as below is showing for MobileDetection.
[2012-05-17 10:21:09] (ERROR @ /index.php) [OnWebPagePrerender]
<b>Notice</b>: Undefined index: browser in <b>/var/www/html/core/cache/includes/elements/modplugin/6.include.cache.php</b> on line <b>201</b>
<b>Notice</b>: Undefined index: browser in <b>/var/www/html/core/cache/includes/elements/modplugin/6.include.cache.php</b> on line <b>131</b>
<b>Notice</b>: Undefined index: browser in <b>/var/www/html/core/cache/includes/elements/modplugin/6.include.cache.php</b> on line <b>131</b>
This error only occurred after MODx upgrade from 2.2.0 to 2.2.2.
