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Just got an Xperia L on Vodafone. Most things work but some apps, especially Twitter won't load despite several uninstalls and restarts. Get the messages "Twitter has stopped" and "Twitter keeps stopping" before I have the chance to set it up
I'm sorry to hear about your issue, but since this is a third party app, you will have to contact them regarding this.
BTW, do you have enough free internal storage?
Not just Twitter. My bank app behaves in the same way. BBC radio iPlayer just came up with the same message and I wasn't using it
What I would do is to repair the phone with XC and check again
Alternatives on How to backup Xperias
Thanks for suggestions. After a lot of poking around various screens I was able to get apps working by resetting internet connections. Not obvious, though. Twitter feed and banking app now OK.