can you test with version 6.0.3 please? Removed the loading of glyphicons in 6.0.2 (normally joomla does), but there seems to be a lot of installations where this is not happening (always depending on template), so i brought them in again..
It is inserting "object Object" and also "yyyy - yyyy", not to mention the dates are upward set so they cross the day line.
Object object has been fixed with 6.0.3. The module settings have to be updated to YYYY instead of yyyy and some other things. As we updated to fullcalendar version 2 with 6.0.0. Sadly this is nothing which could be done automatically.
The upgrade to 6.0.2 was doing the same thing, but suddenly was visible by the update system.
Never figured out why, as it worked.
Anyway, yes, I was attempting to install from a sub directory in the TMP folder, as this is what I normally do, to keep things as clean as possible.
So I tried directly in the TMP folder (after opening), and that didn't help either. Still the warning stuff and error.
But, I tried to install Matukio a few minutes ago, on a clean test site (only template installed to the Joomla 3.5.1), and even there, Matukio will not install.
This is the Matukio once opened... shouldn't it have at least an XML file at this level?
Hmm just talked to Daniel and he has the same issue with windows. When you use another zip software, like 7ZIP, you see an empty folder with script.php and matukio.xml in there which you can use.. Weird..