Dashboard error messages, can't access pages/posts etc.

When I logged in today, this is all I saw:

Warning: simplexml_load_string(): Entity: line 28: parser error : Entity ‘raquo’ not defined in /home3/ju1ce/public_html/wp-content/themes/selftitled/lib/update-notifier.php on line 97

Warning: simplexml_load_string(): l=”alternate” type=”application/rss+xml” title=”Denoizzed Premium Themes » in /home3/ju1ce/public_html/wp-content/themes/selftitled/lib/update-notifier.php on line 97

Warning: simplexml_load_string(): ^ in /home3/ju1ce/public_html/wp-content/themes/selftitled/lib/update-notifier.php on line 97

Warning: simplexml_load_string(): Entity: line 29: parser error : Entity ‘raquo’ not defined in /home3/ju1ce/public_html/wp-content/themes/selftitled/lib/update-notifier.php on line 97

Warning: simplexml_load_string(): l=”alternate” type=”application/rss+xml” title=”Denoizzed Premium Themes » in /home3/ju1ce/public_html/wp-content/themes/selftitled/lib/update-notifier.php on line 97

Warning: simplexml_load_string(): ^ in /home3/ju1ce/public_html/wp-content/themes/selftitled/lib/update-notifier.php on line 97

Warning: simplexml_load_string(): Entity: line 84: parser error : Opening and ending tag mismatch: span line 84 and a in /home3/ju1ce/public_html/wp-content/themes/selftitled/lib/update-notifier.php on line 97

Warning: simplexml_load_string(): <span class=”asterix”>beta in /home3/ju1ce/public_html/wp-content/themes/selftitled/lib/update-notifier.php on line 97

everything on the sidebar to the left is missing so I can’t access anything. Is anybody else having this issue?