Use the 'Other users (including RMH)' login button.
Use your dedicated Canvas account details.
Click 'Join this module'.
In future, just go directly to Canvas: https://canvas.icr.ac.uk/.
The site is for use by ICR and RMH staff and students.
Those users without ICR login credentials must apply for Canvas login details.
If access is granted, login to Canvas using the 'Other users' login instructions above.