HTML5 build failed "10086" - solution

[Toko]

I was getting this 10086 error when building an HTML5 target.

The problem was eventually discovered by a Flare distributor = I added a Google Analytics code in the ac_MasterPage.flmsp file, which caused the problem. Flare does not like their tag "async=". To resolve it, change the syntax to: async="true"

[MikeJasper]

THANK YOU! I kept getting this error w/ Analytics code. You saved me hours of troubleshooting.