Member Login Error ***DATA TRANSFER ERROR***

Greetings!
One of the club officers has been having trouble logging in to our toasthost website. ohpinon.toastmastersclubs.org/
She logs in and then gets "DATA TRANSFER ERROR*** JavaScript Function=MemberLoginStatus=error Error
Please notify is about this a support.toastmastersclubs.org " Please see linked screenshot below.
This issues has persisted at her Work computer (HP-Windows) and at home (not sure what type of computer/OS)
I'm notifying on her behalf. If you can, please correct this error, she is our VP of education and needs access.
Thank you in advance,

Have them click on link at bottom of website to reset website and then try again

Thank you!! This worked wonderfully! She hasn't been able to access the site in months! Thank you. Thank you.