I tested vbulletin version 5.4.4 to 5.6.4, it works

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Description:
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Statistics module showing the total number of users and visitors on the Thread

Important note:
For this module to work, you must first install this product.

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If you installed this mod and/or you want get support, please "Mark as Installed".
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How to install:
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Download the product product_yilmazxviewintopicgmodule.xml and import it through the 'Manage Products' page in the AdminCP.


After logging in as an administrator, click on any thread on the forum home page.

While viewing the Thread, drag the module from the add module section to the bottom of the Thread as shown in the screenshot, not instead of the footer, and save.

that's all it.
enjoy..
*****
Donations always appreciated. 👍

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How to uninstall:
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Go to "Manage Products" in the admincp and delete the product named "Yilmaz - X Viewing Thread Information Module vB5"