Hello Ralf,
Please download next jQuery file: https://mega.nz/#!989m2QxK!L8sOrx3yl5K9MTicvMlJUftruNFcLaAnMEYDp9Qhhtw
And overwrite it to next directory:
wp-content/themes/agama-pro/assets/js/
After that go to your slider general settings and set slider height to zero (0) or just leave height field empty and slider should be set to auto height mode.
If you spot any issues please let me know since i was working in sleep mode 😉
Regards