Error - Blank page after social login.

Strict Standards: Non-static method JApplicationSite::getMenu() should not be called statically, assuming $this from incompatible context in /home/tolokapu/public_html/plugins/system/expiresheaders/expiresheaders.php on line 24

Strict Standards: Non-static method JApplicationCms::getMenu() should not be called statically, assuming $this from incompatible context in /home/tolokapu/public_html/libraries/cms/application/site.php on line 279

Strict Standards: Only variables should be assigned by reference in /home/tolokapu/public_html/plugins/system/expiresheaders/expiresheaders.php on line 24

Notice: Use of undefined constant AZRUL_SYSTEM_PATH - assumed 'AZRUL_SYSTEM_PATH' in /home/tolokapu/public_html/components/com_community/libraries/comment.php on line 16

Warning: require_once(AZRUL_SYSTEM_PATH/pc_includes/JSON.php): failed to open stream: No such file or directory in /home/tolokapu/public_html/components/com_community/libraries/comment.php on line 16

Fatal error: require_once(): Failed opening required 'AZRUL_SYSTEM_PATH/pc_includes/JSON.php' (include_path='.:/usr/lib/php:/usr/local/lib/php') in /home/tolokapu/public_html/components/com_community/libraries/comment.php on line 16