/wp-admin/includes/deprecated.php Error

I recently tried to log in to my WordPress install and I am greeted with the following error:

Fatal error: Allowed memory size of 41943040 bytes exhausted (tried to allocate 30720 bytes) in /home/thesewor/public_html/blissful-reviews.com/wp-admin/includes/deprecated.php on line 529

My site loads fine, but I can’t log into WP to do anything. Can anyone help me out? I haven’t changed anything in awhile and the last time I did anything was maybe last month when I updated and everything was running fine.