Can't reauthenticate LinkedIn

I get the below error: 

Community connector error: Error fetching LIA results: You need to reauthenticate at https://goo.gl/SXgfJN with data source user pqHMghVPhi and then rerun this query. Community connector error: Error: Your LinkedIn Ads authentication is 60 days old. You need to log out from the LinkedIn Ads connector and authenticate again with your account. (Supermetrics request ID: bd0d7JsWY4P4R2knXbPskildP1OJEuBF). If the problem persists report an issue with the connector owner.

Error ID: a53a53e8

When I follow the link to reauthenticate I get:

This page isn’t working
script.google.com redirected you too many times.
Try clearing your cookies.
ERR_TOO_MANY_REDIRECTS

I tried getting to the 'Supermetrics authentication for LinkedIn Ads'  pane as previously had issues when we had more than 1 user authenticated. When I try and remove a user from there I get the same redirect error as above.

Can someone please help us here?

The error is visible in a client's dashboard and we need this up and running asap.