Notice: Trying to get property of non-object in home/public_html/admin/controller/extension/modification.php o

Notice: Trying to get property of non-object in /home/kihawhmi/public_html/admin/controller/extension/modification.php on line 145Warning: Cannot modify header information - headers already sent by (output started at /home/kihawhmi/public_html/admin/controller/startup/error.php:34) in /home/kihawhmi/public_html/system/library/response.php on line 12

The code on localhost running perfectly but the code on live server getting error , after refreshing Modifications.