I am facing same problem in AEM 6.2. Is this issue resolved .If yes, could you provide the steps.

Hi Praveen,We are upgrading from 5.6.1 to 6.2.We have placed .tld file inside /META-INF and .tag file is inside /META-INF/tags and it is working fine without giving any errors in 5.6.1.We have installed all the bundles to 6.2 environment, now the error is"File /META-INF/tags/HelloTag.tag not found"....

Hi,I am having the same problem.In the link provided above they were telling to  the com.day.cq.rewriter.xml.XSLTTransformer class.Could please someone tell me how I can modify the Transformer class.