OK, resolved!
We had to change the child theme we made.
These are the changes (PLEASE NOTE: these changes only apply to our child theme!):
.main-navigation #menu-main .sub-menu { padding-top: 16px; border-top: none; position: absolute; width: 250px; left: 50%; margin-left: -117px; text-align: center; }
Changed in:
.main-navigation #menu-main .sub-menu { margin-top: 10px; border-top: none; width: auto; }
AND
.main-navigation #menu-main .sub-menu a { font-size: 1.3em; padding: 13px 10px; color: #fff; }
changed in:
.main-navigation #menu-main .sub-menu a { font-size: 1.2em; padding: 13px 10px; color: #fff; }
Hope this can help anyone else.
Greetz, Bert
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This reply was modified 6 years, 7 months ago by bertdynamica.
It seems that the formatting of the sub-menu-items is causing the error.
As a test I activated the standard theme and then the sub-menu-items were displayed correctly. I will have to find the solution there.
Greetz, Bert