How do you enable classes?

Please keep me posted if you have any update. I have just been researching other third party apps such as CartSpan and WeIntegrate but it's a one time and annual fee, once again. 

Same situation here. Been trying to connect for a month and a half. Intuit blames Shopify, Shopify has now escalated issue to their "tech team" where I sent them a series of logs. No word yet. They ask if I have migrated data and, yes, we have migrat...