Page Builder and WPML Compatibility problem

Hi,
I installed Page Builder, but can not see the PB tab and use its’ functionality, when WPML is activated. If I deactivate WPML Multilingual, Page Builder is working fine. I have 2 WPML Plug-ins: the core one (Multilingual) and String translation. String is irrelevant. If I dectivate it, nothing happens. But the core plug-in matters. Do you have an idea, how to solve this compatibility problem?
I have 3 languages on my site and I need WPML. At the same time, page builder ist also important for me, as I can not write the code properly. So I really need the solution.
Thanks in advance.
Kristina