Users can't access 'Profile' in the UCP

[Acorn]

Support Request Template
What version of phpBB are you using? phpBB 3.1.10
What is your board's URL? Sorry, it's a private board
Who do you host your board with? Dataflame
How did you install your board? I used the download package from phpBB.com
What is the most recent action performed on your board? Update from a previous version of phpBB3
Is registration required to reproduce this issue? Yes
Do you have any MODs installed? No
Do you have any extensions installed? Yes
What version of phpBB3 did you update from? phpBB 3.1.9
What extensions do you have installed? Add User
Board Announcements
Right Header Image
What styles do you currently have installed? prosilver and 2 modified prosilver
What language(s) is your board currently using? English
Which database type/version are you using? MySQL 5
What is your level of experience? New to PHP but not phpBB
What username can be used to view this issue? No answer given
What password can be used to view this issue? No answer given
What actions did you take (updating your board; installing a MOD, style or extension; etc.) prior to this problem becoming noticeable? The last thing that was done was updating the board, but that was a good few months ago (I am currently unable to update the board because my internet connection is so unreliable and slow, but should be able to update in a few weeks).
Please describe your problem. When a user clicks on 'profile' from inside their UCP they get a blank page. All the other parts of the UCP work properly.
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