Mandatory information about my setup:

Have I searched the tickets before posting? No
Have I searched the forum before posting? No
Have I read the documentation before posting (which pages?)? No
Joomla! version: (unknown)
PHP version: (unknown)
MySQL version: (unknown)
Matukio version: (unknown)
Direct link to the page that shows the issue: (unknown)


Description of my issue:
Hallo, ich wollte auf die Version 4.5.2 updaten, da kam immer die Meldung

"Warnung
JInstaller: :Install: Die XML-Installationsdatei konnte nicht gefunden werden."

Was mach ich falsch?
Danke.