Nothing showing, no login, no page, no errors.

Posting this in case anyone else experiences this.

I think I had an older version of Spark, and tried to upgrade, but then the app wouldn't show anything. No pages, and very curiously, no errors in the console.

Eventually I tracked it down to something involving the v-cloak directive. No link was turning up anything that was explaining what was happening. So I did a fresh install of Spark and everything was working. So I began trying to find what was causing the problem.

Looks like Spark was built before Vue 2.0, and was using inline-templates, and maybe there was another change that the v-cloak directive needs to be on the actual Vue instance div.

In older versions of Spark, the v-cloak directive was on the body tag, and moving it to the the spark-app div, then the site begins appearing again.

Unfortunately, this does not seem to be mentioned in the upgrade guide.