Today I updated my WP install to the newest Alpha version. After the new version installed whenever I try to login to my admin dashboard it gives me the above message.From what I learned from some websites is that something is being included more than once in a file, and it is giving this error. Does this problem have to do with my plugins or the new version of WordPress, and is there any way to fix it? Here's the full message. Sorry if this is in the wrong section, and for bothering you guys.
Fatal error: Cannot redeclare tinymce_include() in /home/switz/public_html/wp-admin/includes/deprecated.php on line 21