On the 15th of January 2020, we sunsetted the TeamViewer versions 5, 6 and 7. You will find more information in our announcement here: Sunset of TeamViewer 5, 6 and 7. This is why the modules in version 6 you are trying to connect to, are not working.
As you have a license for TeamViewer 11, we recommend you to install TeamViewer 11 on all your devices and the ones you are connecting to.
I hope this could help. If not, do not hesitate to ask your questions here.
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