How do I connect an Xbone controller to my 4.4.2 SCH-i535?

Hello again!
I'm still new fairly here as this is my second post.

I have a Verizon Galaxy S3 (SCH-i535) I rooted with Towelroot. I don't have any kind of Superuser app installed on my phone, and I don't know if I can install Safestrap.

I want to connect my Xbox One controller via a USB OTG cable to my phone for use with Retroarch. The controller vibrates when I plug it into my phone, but there are no lights and I get no response from pressing the buttons in Retroarch. I used the Easy OTG Checker app and found that my phone correctly identified my controller as "Microsoft Controller". I tested my keyboard with the OTG cable in Retroarch and Chrome and and it worked, so I know my OTG cable is working. However, I still can't get any app to respond to my Xbox One controller.

After looking at some tutorials I saw that I may need the USB/BT Joystick Center app installed in order to actually use the controller. I installed the app, tapped the "Search" button, and got the following error:

Code:

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Cannot get access to '/dev/uinput'. Please install a custom rom with root rights.

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I do have root rights, so there must be something blocking the app from accessing /dev/uinput. Is this because I don't have a Superuser app installed?

Also, can I install Safestrap?

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