php - SCREAM: Error suppression ignored for Fatal error: Call to undefined method

I have read many posts regarding this error, but not found any working solution for me.

I have a site and master config file which loads all the class files.

Now i created a sub folder in my site and included the master config from parent folder which loads class files.

But i cannot use any of the class functions from subfolders.

I have tested by adding a die statement on one class files, and script perfectly 'died'. but the issue is i cannot use the functions.

.com

class
--class.document.php
subsite
--index.php
master.config.php
index.php
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The problem occurs when using functions insidesubsite/index.php

SCREAM: Error suppression ignored for
Fatal error: Call to undefined method Document::loadHelper() in sitepath\subsite\index.php on line 13
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and on line 12 & 13

$Document = Document::getDocument();
$Document->loadHelper('properties');
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