Send the following on WhatsApp
Continue to ChatStep by Step Guide to Getting an ePub to Validate Using Sigil https://howtowriteshop.com/2012/09/step-by-step-guide-to-getting-an-epub-to-validate-using-sigil/
Step by Step Guide to Getting an ePub to Validate Using Sigil https://howtowriteshop.com/2012/09/step-by-step-guide-to-getting-an-epub-to-validate-using-sigil/