I think there is some confusion in this discussion about your phone/computer security and the PA website security.
If PA were a shopping site, You might not want to enter your credit card number until the site is updated.
If your browser is blocking PA. then your phone or computer is most likely up to date and should not be a problem at other sites requesting sensitive data.
if you downgrade your browser to be able to access PA, then you would be circumventing the latest security measures for all sites you visit.
a workaround would be to install a second older/compatible browser just to be able to continue visiting this and other sites that become "broken". you should not use that older browser to do banking etc. this is not the only site that has problems.
