Module does not save.

Hi. I have installed the module and try to adjust the settings. Unfortunately the 'save' and 'save and close' buttons do not work. See this video: https://drive.google.com/open?id=1vNB4c3iIhTXY9AvrGdar-yVp1ZTh-5G_&authuser=rob%40borol.nl&usp=drive_fs
Resolved
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