Submissions Login problem

To the team of RM,
re are using RM in Premium Version for almost 2 years on our clients’ website for student apartment rentals. Applicants can leave their data in the application form (done using RM). They can log in and access their submission after by signing in on the “BEWERBER-LOGIN” page.

Here our recent BIG problem:
The link that should lead the user to his/her own submission data site is NOT working anymore since the mayor update done between versions 3.8.2.6 and 4.5.4.1. When the user wants to sign in using the provided username and password he first comes BACK to the same login page and if you try to login again you are sent to http://new.plugandstudyhome1.de/wp-admin/ instead of http://new.plugandstudyhome1.de/rm_submissions as it was before and as it should be!!!! Try yourself, please: User “barbara” Password “barbara”.
Meanwhile we have found out following mistakes being shown while the system tries to proceed the task:
SyntaxError: ‘#rm_login_form_3 :input:visible:enabled’ is not a valid selector
SyntaxError: ‘#rm_login_form_1 :input:visible:enabled:first’ is not a valid selector
SyntaxError: ‘#rm_login_form_1 :input:visible:enabled’ is not a valid selector
SyntaxError: ‘.permalink-structure input:radio’ is not a valid selector

We need your assistance and help really quickly in order to assure login to already sent submissions. If you need to access our system we can deliver an admin pass for WP anytime and quickly.

Thank you in advance and kind regards,

Peter Askanazy

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