I have updated Magento from 188.8.131.52 to 184.108.40.206. But after updating to this latest version, Magento is ignoring email-inline.css file for Transactional email. Because all the sales emails templates were working fine before updating but now system is not applying emial-online.css styles.
But when I write css directly in template in Magento Admin panel, than system apply those css styles.
I have already checked my settings in Admin -> configuration -> General -> Design -> Transactional Email (Non-inline CSS File) field.