I am unable to view, cancel or change my reservation on both the Mobile App as well as the southwest.com website. My only alternative to do any of those above use cases is to call the 1-800 number for which I had to wait 40 minutes on-hold in order to get my reservation changed, but this error is still occuring after the support call.
I have seen a couple of previous threads say that this only impacts the Mobile App, but I wanted to share that this software bug is also impacting the website. Here are the screenshots from the website as well as App for the same reservation and use cases:
Unfortunetly I'm not able to see the images yet, so I can't comment on the specific error, but I will offer the suggestion of using the live chat function in the app if you are making changes that don't require payment. You may need to contact Customer Relations to have someone look at your account if this problem continues for you on future reservations.