Adding Modules not possible

We use the Knowledepress 3 Theme with Live Composer.

Tried to add new entrys in Administration for:

– Widget module
– Navigation module

But there is only shown a Button with Text “Click to Edit”, but when click in the field, nothing happens. We have no possibility to add new modules.

Only the function “delete” works.

Tested it also with the original Version Live Composer.
But same Problem.

https://ww.wp.xz.cn/plugins/live-composer-page-builder/