Login problems

Having a problem with Edwiser all of a sudden.
When students try to login to Moodle directly (https://www.institute-of-photography.com/moodle/), it throws them back to the main WordPress home page straight away (https://www.institute-of-photography.com). This is confusing students as it is a new problem.
You used to be able to log in to Moodle with no problems but now students are being thrown back to WordPress.
Any help would be appreciated.

The page I need help with: [log in to see the link]