hey!!
mh these are all warnings that are shown if in wp-config.php DEBUG_LOG is set to true. these are not errors, so its weird that the wp-login doesnt work
can u try this:
in your ftp, go to your wordpress folder.
find a file called
wp-config.php
find the line that says:
define( 'WP_DEBUG', true );
and change it to
define( 'WP_DEBUG', false);
