Hi KarynL88 ,
Apologies for any inconvenience caused.
It seems that something on your server is preventing the page from showing. Please check your PHP error log and tell us if anything related to ATUM is saved there.
Please read this if you don't know how to activate it. You'll have to try to enter the page again to get the errors saved if it wasn't active.
Best Regards,
José Andrés