try this SOLUTION:
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serval2412
Posts: 7
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Re:e-commerce tracking doesn't work anymore with vm! 1 Week, 3 Days ago
I've made some cleaning of the code, add some comments to explain the code, and i changed the trigger to put the Google Analytics scripts just before the end body.
I tested, it works for me.

If someone wants to try this new version, here's the link :
serval2412.free.fr/plg_gacode-1.0.2.zip

Thanks AGuerrero, version at serval2412.free.fr/plg_gacode-1.0.2.zip worked for me

The problem I had was the plugin would cause joomla to not respond and the module version would work, but wouldn't send the transaction (only sent the additem data)

new plugin work great

Dan