New theme=error navigating to customize and widgets

Replies: 2

I recently switched themes. When I try to go to appearance then either customize or widgets, I receive this error:
PHP Warning: DOMDocument::loadHTML(): htmlParseEntityRef: no name in Entity, line: 1 in C:\Inetpub\vhosts\emilygannon.com\httpdocs\wp-includes\widgets\class-wp-widget-text.php on line 122
PHP Warning: DOMDocument::loadHTML(): htmlParseEntityRef: no name in Entity, line: 3 in C:\Inetpub\vhosts\emilygannon.com\httpdocs\wp-includes\widgets\class-wp-widget-text.php on line 122
PHP Warning: DOMDocument::loadHTML(): End tag : expected ‘>’ in Entity, line: 14 in C:\Inetpub\vhosts\emilygannon.com\httpdocs\wp-includes\widgets\class-wp-widget-text.php on line 122

I need some assistance!! please and thanks so much!