Getting Error in Admin Dashboard

Hello guys,

I’m a user of W3TC plugin and happy with outcome made by the plugin. Recently, I tried to optimize one of my site and message appeared at my admin dashboard once the plugin activated.

This is what the error:

Warning: Attempt to modify property of non-object in ….lib/admin/notify.php on line 30

Warning: Cannot modify header information – headers already sent by (output started at …../wp-includes/option.php on line 748)

Anyone ever experience such error? If yes then I hope you don’t mind to share the solution to me.

Thanks in advance.

https://wordpress.org/plugins/w3-total-cache/