Is the basket bar ledge for your 2014-earlier VISTA stroller bent? This can happen when too much weight is put into the basket. Luckily, this is an easy fix, you will just need some pliers.
The round basket bar sits on a flat ledge. You will need some pliers to bend the ledge. Most likely, you will need to bend the ledge upward and inward to flatten and straighten the ledge so the basket bar sits smoothly. Since each bent basket bar ledge is different, the direction and how much the ledge needs to be bent will vary.