I’m really sorry but I was unable to find this information over the internet, hence, here is my last resource. Whatever document I try to validate using HTML5 Validation Service, I get the following message: Sorry! This document can not be checked. 1. ErrorExternal Checker not available Checking the Document Type of this document requires the help of an external tool which was either not enabled in this validator, or is currently unavailable. Check in the validator's system configuration that HTML5 Validator is enabled and functional. The error encountered was: 500 Can't connect to localhost:8888 (connect: Connection refused) There’s no longer this service available anymore? Thanks in advance, and sorry for any inconvenience, Márcio
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