As always, users sometimes assume that a solution to a firmware issue, is to reinstall the the particular component. The Nokia App Wizard is supplied by Nokia themselves, the user can be correct to say that Nokia should provide the solution but the user can also find the solution for the elimination of this problem.
The Nokia Store does provide web browser for users to use, but in this fact : you do need the default web browser, now of course you can’t reinstall the web browser so the best option would be for a reset but the users that have reported this issue have mentioned that this does not work.
It seems that the web browser is the root of the issues, judged on the base of : when the Nokia Social Service app requires the web browser, the web browser gives the message “System error”; indicating that this purely the system software at fault, read below of the answer to this problem.
You do have an option of waiting till Symbian Belle is released at the expected date of 8th February or you could also re-install the firmware, it is recommended to perform a back up manually than a back up using an app; copy all your files to your pc, then restore after the successful re-installation of the firmware.