You have a lot of coding errors on your Product Info pages which need to be corrected.

For example, before the module code there are 3 unclosed DIV tags.

Unclosed element div.

From line 642, column 7; to line 642, column 32

<div class="page-content">


Unclosed element div.

From line 641, column 5; to line 641, column 28

<div class="tie-indent">


Unclosed element div.

From line 640, column 3; to line 640, column 19

<div class="tie">


Your current problems with the module not displaying are not related to the module code but to the other coding errors. The module code itself works fine but when there are a lot of coding errors, they need to be corrected first.