When I click on “Go to studio”, I get reconnected to this same exact site.
I tried clearing my cookies, logging in in an incognito tab and logging in in a different browser, but nothing helped.
My guess is that you are trying to log into Edge Impulse through your (trial) organization URL (e.g. https://studio.edgeimpulse.com/organization/85176). Since the trial has ended, that organization can no longer be accessed. To remedy this, try logging in through the main Edge Impulse page (https://edgeimpulse.com/) or through the Studio link: https://studio.edgeimpulse.com/