We have a clean install of AEM Forms 6.5.3 and we see this error in the server.log:
[org.apache.tika.utils.XMLReaderUtils] (async-index-update-fulltext-async) SAX Security Manager could not be setup [log suppressed for 5 minutes]: java.lang.IllegalArgumentException: Property 'http://www.oracle.com/xml/jaxp/properties/entityExpansionLimit' is not recognized.
The error doesn't appear to break anything. Is this error normal for 6.5 or is something configured wrong?
Can you confirm the environment and if it's 6.2 or 6.5?