Blank Screen after last update (3 replies)

Hi Guys

I just update my Piwik to latest release and I have blank screen. I can not login. I did small investigation and I can see some errors

GET http://85.17.23.18/piwik/plugins/Morpheus/images/logo.svg 404 (Not Found) (index):60
GET http://klanmichalakow.org/piwik/angular.min.js.map 404 (Not Found) (index):24
Uncaught TypeError: Cannot read property 'invoke' of undefined index.php?module=Proxy&action=getCoreJs&cb=b793e7d3f1ed85a0dcef9e7bd86fed9f:1146
GET http://85.17.23.18/piwik/plugins/Morpheus/images/logo.svg 404 (Not Found)

I did not update piwik about one year, I do not remember what version I had before upgrade, sorry :)
I think I did update to 2.8.3


regards
Karol