Hi Stefan,
i tried it…
i upgradet the php to 5.6
(add-apt-repository ppa:ondrej/php;; apt install install php5.6 php5.6-mysql php5.6-mcrypt)
i disabeld 5.5 in apache and enabeld 5.6, i also enabled mysqli and mcrypt in the new php.ini.
after that i do upgrade an it updates the eGw … to 17.1 without any errors.
Iam able to log in the eGw but there is no content inside and the apache log is full with errors like this:
[Fri Apr 13 15:52:26.154787 2018] [:error] [pid 13372] [client xx.xxx.176.1:64375] An error happened (EGroupware\\Api\\Excep\
tion\\AssertionFailed): CreateObject(calendar_uiviews) file /usr/share/egroupware/calendar/inc/class.calendar_uiviews.inc.ph\
p not found!, referer: https://xxxx.xxxx.xx/egroupware/index.php?cd=yes
[Fri Apr 13 15:52:26.154834 2018] [:error] [pid 13372] [client xx.xxx.176.1:64375] #0 /usr/share/egroupware/index.php(151): \
CreateObject('calendar.calend...'), referer: https://xxxx.xxxx.xx/egroupware/index.php?cd=yes
[Fri Apr 13 15:52:26.154844 2018] [:error] [pid 13372] [client xx.xxx.176.1:64375] #1 {main}, referer: https://xxxx.xxxx\
.xx/egroupware/index.php?cd=yes
[Fri Apr 13 15:52:26.154856 2018] [:error] [pid 13372] [client xx.xxx.176.1:64375] # Instance=default, User=sebastian, Reque\
st=GET https://xxxx.xxxx.xx/egroupware/index.php?menuaction=calendar.calendar_uiviews.index, User-agent=Mozilla/5.0 (\
Windows NT 10.0; Win64; x64; rv:59.0) Gecko/20100101 Firefox/59.0, referer: https://xxxx.xxxx.xx/egroupware/index.php\
?cd=yes
[Fri Apr 13 15:53:01.588041 2018] [:error] [pid 13332] [client xx.xxx.176.1:64407] An error happened (EGroupware\\Api\\Excep\
tion\\AssertionFailed): CreateObject(notifications_ajax) file /usr/share/egroupware/notifications/inc/class.notifications_aj\
ax.inc.php not found!, referer: https://xxxx.xxxx.xx/egroupware/index.php?cd=yes
maybe some1 have any hints for me.