SAP Web Page Composer: Detailed Navigation is not getting built

Hello!

I am new at this forum. At first I´d like to say hello to everybody! :]

Our issue concerns the following:

We started to work mit the Web Page Composer to build websites für our workers. Everything worked fine until the detailed WPC-navigation is not getting built anymore. We have this issue after a portal restart. Every steps to build and publish a website were done the right way.

1. Publish navigation und paste it to the external connector of the role in the form "wpcnavigation:///wpcontent..."

2. Permissions and security zones were set. Even the super admin is not able to see the detaild navigation anymore.

It is still possible to put single webpages to iViews and then to display them in the portal. And every function of the Web Page Composer works fine. The caches are deactivated. I tried to build a new site with new pages and a new navigation but there is the same problem, no detailed navigation is shown in the portal navigation. The role is assigned to a user and he can see the role at the top navigation but when clicking on it no detailed navigation appears, just a blank page.

As I mentioned this iusse appears after a portal restart. What could be the problem?

Thank you in advance!

Best regards

Georg