Hello @Ashish_k_php
SUPEE 11219 has uploader.php file changes.
app/code/core/Mage/Core/Model/File/Uploader.php
https://magento.stackexchange.com/questions/292092/supee-11219-potential-issues
So i think this should has caused the issue.
Suggestions
1. Try installing the patch from pre patched files
https://github.com/magecomp/Magento-Pre-Patched-Files/tree/master/SUPEE-11219
2. Upgrade your Magento version to latest Magento 1.9.4.3 which includes all the security patches.
