I have possibly found a bug in this addon. Although it could be related to Widget Framework.
Code:
Undefined property: XenForo_ControllerResponse_Redirect::$params
XenForo_Application::handlePhpError() in ForceStyleOnPrefix/ControllerPublic/Thread.php at line 9
ForceStyleOnPrefix_ControllerPublic_Thread->actionIndex() in XenForo/FrontController.php at line 310
XenForo_FrontController->dispatch() in XenForo/FrontController.php at line 132
XenForo_FrontController->run() in C:/Winginx/home/xen/index.php at line 13
This error occured as follows:
I have the recent threads widget of widget framework. It shows recent X threads. One of the threads has a prefix. I moved this thread to a forum with no prefixes. Thread has been moved successfully and of course the prefix disappeared. But now the thread is displayed twice in the recent threads widget. The first is the thread from the original location and the second is the thread moved to a different location. The second link works with no issues. The first however brings me to the above error message. If I disable the Force Style on Prefix addon, the first link works. I enable it and again the error message above occurs if I click the first link.
So actually there are two issues. Duplicated threads in the recent thread widget if a thread is moved and the above error message. I have forwarded xfrocks to this post for the duplicated thread issue.
Edit: oops, I missed a line from the error message. Have added it now.