Yesterday morning I was able to search for multi-city award travel but then last night and today I can pick my first flight but then I receive this message and it refuses to show me the second flight.
We are unable to process your request. Please see the message below for details.
We’re sorry, but united.com was unable to complete your request. Please try later or contact united.com Support in the U.S. and Canada at 1-888-491-6573; the U.K., phone 0800 028 5003; elsewhere use the local phone number.
I vaguely recall this happening in the past too. Seems to be no rhyme and reason as for why and when it happens.
Currently having issues staying logged now, started around the same time as the award travel search issue. Highly irritating to log in, load a new page which shows me not logged in.