Webtop admin / admin entry. White screen

[mrmarkuz (Markus Neuberger)]

Thank you @lucag,

now I can see my admin white screen after login again.
I hope @wahmed has a solution for the white screen problem because I changed the certificate.

EDIT:
I uninstalled Webtop 5 via Software center. Then I changed the name of the webtop db to wt_backup. Then I removed Webtop packages with

yum remove *webtop*

Reinstalled webtop, new database, same problem, admin white screen.

The errors in webtop.log:

2017-09-23 10:41:34 [ERROR] c.s.webtop.core.app.ServiceManager - PrivateService: initialize() throws errors [java.lang.ClassCastException: com.sonicle.webtop.core.CoreManager cannot be cast to com.sonicle.webtop.core.admin.CoreAdminManager]
2017-09-23 10:41:34 [ERROR] c.sonicle.webtop.core.servlet.Start - Error
com.sonicle.webtop.core.sdk.WTRuntimeException: Cannot add private service twice

I saw, there a more threads where this problem occured, but not solved:

Blank screen after first admin login to Webtop5

NethServer Version: NethServer release 7.3.1611 (Final) Module: Webtop5 I have a fresh installation of nethserver. I added a webtop 5 with no errors. After login with admin/admin, only blank page (nothing on it) opened. In a log I see couple errors, but have absolutely no idea what I can do about it. There is today’s log for webtop: 2017-05-05 07:31:06 [INFO ] c.sonicle.webtop.core.app.WebTopApp - webtop.extjsdebug = true 2017-05-05 07:31:06 [INFO ] c.sonicle.webtop.core.app.WebTopApp - …

WebTop5 installation

Hi everyone, I’m trying to install webtop5. I read in the old posts but I didn’t understand what I should do. I use NS 7.3.1611 (Final) and run webtop4. I tried uninstalling webtop4 and installing webtop5, but I received incompatibility errors from YUM libraries. Is there a cheklist to do, to follow? Thank you