XF 1.5 Getting a Server Error when opening a post

Hi all,

I've been in the process of making my Forum and after not going to the site for a while and returning today, I received the following error when I open any post on the website.

Anyone have any ideas?

rtrim() expects parameter 1 to be string, array given

  1. XenForo_Application::handlePhpError()
  2. rtrim() in Andy/SimilarThreads/ControllerPublic/Thread.php at line 56
  3. Andy_SimilarThreads_ControllerPublic_Thread->actionIndex() in XenForo/FrontController.php at line 351
  4. XenForo_FrontController->dispatch() in XenForo/FrontController.php at line 134
  5. XenForo_FrontController->run() in /home/marshallingroom/public_html/index.php at line 13

You can try it yourself - http://www.marshallingroom.com/threads/just-checked-in-to-the-marshalling-room.19/
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