Hi,
thanks very much for your reply.
I do have the message in my log file.
{main}\",\"File\":\"\\\/www\\\/htdocs\\\/xxxx\\\/wolke\\\/lib\\\/private\\\/Files\\\/View.php\",\"Line\":2088}","userAgent":"--","version":"12.0.1.5"}
{"reqId":"IEeUdCe4PsEensLgO1gy","level":3,"time":"2017-08-09T18:02:18+02:00","remoteAddr":"","user":"--","app":"updater","method":"--","url":"--","message":"\\OC\\Updater::failure: InvalidArgumentException: $absolutePath must be relative to \"files\"","userAgent":"--","version":"12.0.1.5"}
{"reqId":"IEeUdCe4PsEensLgO1gy","level":3,"time":"2017-08-09T18:02:18+02:00","remoteAddr":"","user":"--","app":"updater","method":"--","url":"--","message":"\\OC\\Updater::updateEnd: Update failed","userAgent":"--","version":"12.0.1.5"}
{"reqId":"IEeUdCe4PsEensLgO1gy","level":1,"time":"2017-08-09T18:02:18+02:00","remoteAddr":"","user":"--","app":"updater","method":"--","url":"--","message":"\\OC\\Updater::maintenanceActive: Maintenance mode is kept active","userAgent":"--","version":"12.0.1.5"}
{"reqId":"IEeUdCe4PsEensLgO1gy","level":1,"time":"2017-08-09T18:02:18+02:00","remoteAddr":"","user":"--","app":"updater","method":"--","url":"--","message":"\\OC\\Updater::resetLogLevel: Reset log level to Warning(2)","userAgent":"--","version":"12.0.1.5"}
{"reqId":"WYszqVUNkK8AAGCiO44AAAAL","level":3,"time":"2017-08-09T18:09:13+02:00","remoteAddr":"149.7.112.147","user":"--","app":"PHP","method":"GET","url":"\/","message":"file_get_contents(\/www\/htdocs\/xxxx\/wolke\/data\/appdata_ocu3d6cgenj0\/js\/core\/merged-template-prepend.js.deps): failed to open stream: No such file or directory at \/www\/htdocs\/xxxx\/wolke\/lib\/private\/Files\/Storage\/Local.php#209","userAgent":"Mozilla\/5.0 (Windows NT 6.1; WOW64; rv:45.0) Gecko\/20100101 Firefox\/45.0","version":"12.0.1.5"}
{"reqId":"WYszqVUNkK8AAGCiO44AAAAL","level":3,"time":"2017-08-09T18:09:13+02:00","remoteAddr":"149.7.112.147","user":"--","app":"PHP","method":"GET","url":"\/","message":"Invalid argument supplied for foreach() at \/www\/htdocs\/xxxx\/wolke\/lib\/private\/Template\/JSCombiner.php#107","userAgent":"Mozilla\/5.0 (Windows NT 6.1; WOW64; rv:45.0) Gecko\/20100101 Firefox\/45.0","version":"12.0.1.5"}
{"reqId":"WYszqVUNkK8AAGOBRVcAAAAN","level":3,"time":"2017-08-09T18:09:13+02:00","remoteAddr":"149.7.112.147","user":"--","app":"PHP","method":"GET","url":"\/index.php\/js\/core\/merged-template-prepend.js?v=8a3cb98b7e42f9cb077a2706373c8a8e-10","message":"file_get_contents(\/www\/htdocs\/xxxx\/wolke\/data\/appdata_ocu3d6cgenj0\/js\/core\/merged-template-prepend.js.gzip): failed to open stream: No such file or directory at \/www\/htdocs\/xxxx\/wolke\/lib\/private\/Files\/Storage\/Local.php#209","userAgent":"Mozilla\/5.0 (Windows NT 6.1; WOW64; rv:45.0) Gecko\/20100101 Firefox\/45.0","version":"12.0.1.5"}
{"reqId":"WYsz2FUNkK8AABbJQiUAAAAI","level":3,"time":"2017-08-09T18:10:01+02:00","remoteAddr":"149.7.112.147","user":"maxxx","app":"no app in context","method":"GET","url":"\/","message":"Exception: {\"Exception\":\"Symfony\\\\Component\\\\Routing\\\\Exception\\\\RouteNotFoundException\",\"Message\":\"Unable to generate a URL for the named route \\\"theming.Theming.getStylesheet\\\" as such route does not exist.\",\"Code\":0,\"Trace\":\"#0 \\\/www\\\/htdocs\\\/xxxx\\\/wolke\\\/lib\\\/private\\\/Route\\\/Router.php(339): Symfony\\\\Component\\\\Routing\\\\Generator\\\\UrlGenerator->generate('theming.Theming...', Array, 1)\\n#1 \\\/www\\\/htdocs\\\/xxxx\\\/wolke\\\/lib\\\/private\\\/URLGenerator.php(77): OC\\\\Route\\\\Router->generate('theming.Theming...', Array)\\n#2 \\\/www\\\/htdocs\\\/xxxx\\\/wolke\\\/apps\\\/theming_bck\\\/appinfo\\\/app.php(29): OC\\\\URLGenerator->linkToRoute('theming.Theming...', Array)\\n#3 \\\/www\\\/htdocs\\\/xxxx\\\/wolke\\\/lib\\\/private\\\/legacy\\\/app.php(209): require_once('\\\/www\\\/htdocs\\\/v13...')\\n#4 \\\/www\\\/htdocs\\\/xxxx\\\/wolke\\\/lib\\\/private\\\/legacy\\\/app.php(149): OC_App::requireAppFile('theming_bck')\\n#5 \\\/www\\\/htdocs\\\/xxxx\\\/wolke\\\/lib\\\/private\\\/legacy\\\/app.php(124): OC_App::loadApp('theming_bck')\\n#6 \\\/www\\\/htdocs\\\/xxxx\\\/wolke\\\/lib\\\/base.php(989): OC_App::loadApps()\\n#7 \\\/www\\\/htdocs\\\/xxxx\\\/wolke\\\/index.php(48): OC::handleRequest()\\n#8 {main}\",\"File\":\"\\\/www\\\/htdocs\\\/xxxx\\\/wolke\\\/3rdparty\\\/symfony\\\/routing\\\/Generator\\\/UrlGenerator.php\",\"Line\":130}","userAgent":"Mozilla\/5.0 (Windows NT 6.1; WOW64; rv:45.0) Gecko\/20100101 Firefox\/45.0","version":"12.0.1.5"}
Cheers
Max