error messages on dashboard

My website is https://www.theeverydayadventure.com

I logged in today and have the following error message:

Warning: Attempt to modify property of non-object in /home3/suthers/public_html/wp-content/plugins/leadpages/leadpages.php on line 1051

Warning: array_search() expects parameter 2 to be array, null given in /home3/suthers/public_html/wp-content/plugins/leadpages/leadpages.php on line 1052

Warning: Attempt to modify property of non-object in /home3/suthers/public_html/wp-content/plugins/leadpages/leadpages.php on line 1052

Warning: Invalid argument supplied for foreach() in /home3/suthers/public_html/wp-includes/update.php on line 267

Warning: An unexpected error occurred. Something may be wrong with www.ads-software.com or this server’s configuration. If you continue to have problems, please try the support forums. (WordPress could not establish a secure connection to www.ads-software.com. Please contact your server administrator.) in /home3/suthers/public_html/wp-includes/update.php on line 399

Does anyone know what this means or how to fix it??
Thank you!