I get this errors all the time and everyday

[Fri Jun 30 9:11:19 2017] [ow_core_log] [Notice] Message: Trying to get property of non-object File: /home/mysite/public_html/ow_plugins/photo/components/page_head.php Line:131 [Fri Jun 30 9:11:19 2017] [ow_core_log] [Notice] Message: Trying to get property of non-object File: /home/mysite/public_html/ow_plugins/photo/components/page_head.php Line:132 [Fri Jun 30 9:11:19 2017] [ow_core_log] [Notice] Message: Trying to get property of non-object File: /home/mysite/public_html/ow_plugins/photo/components/page_head.php Line:134 [Fri Jun 30 9:11:19 2017] [ow_core_log] [Notice] Message: Trying to get property of non-object File: /home/mysite/public_html/ow_plugins/photo/components/page_head.php Line:135