Additional conditions tags to work

Count the brackets, you’ve got an extra one:

//                                     ↓ here
if ( is_user_logged_in() & !is_admin() ) & !is_page('account') ) {

Also, you should use double ampersands in conditions like this. So:

if ( is_user_logged_in() && !is_admin() && !is_page('account') ) {

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