Right now it is not working for me, on any browser, even after clearing cookies, and not even in the app (i am trying to change a flight and even the app sends me to a dead link)

I get this:

Internal Server Error - Read

The server encountered an internal error or misconfiguration and was unable to complete your request.Reference #3.e481655f.1641289641.ad457d18

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Edit later: at some point it all started working again. They are clearly having some server problem on and off these days