[TYPO3] Invalid argument supplied for foreach in TemplaVoila

[Tiziano Fogliata]

Hi,
I've recently upgraded from Typo3 4.0.2 to Typo 4.0.4 and TemplaVoila to
1.2.1.
If I go in the Extension Manager and I click on TemplaVoila I can see this
Warning (repeated 9 times):
*
Warning*: Invalid argument supplied for foreach() in *
/home/mercury/typo3_src-4.0/t3lib/class.t3lib_install.php* on line *392

*Anyone has some ideas to solve it?

Thanks.
Best Regards,
Tiziano.