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When trying to log on to the Stack Exchange app (since I have decided to become an active member rather than just browsing like I used to) I get the following error.
'key' is not valid 'access_token', not found.
I know the login info is correct and I have internet. My device is a Samsung Galaxy S5 running Android 4.4.2 and I don't know if the rest is relevant but here it is anyway the Security software version is
MDF v1.0 Release 3
VPN v1.4 Release 1
What do I do?