Hmm, Energy Sistem's support suggested that I reinstall their OS to see if it works. However, I did not manage to get so far. I've downloaded their firmware package and installed the drivers with it. The Rockchip Batch Tool v 1.7, however, appeared not to install its own drivers as suggested per manual and also did not recognize the Pro +. I therefore could not continue with the flash procedure.
I will try a different WLAN network but currently don't think that this can make a difference. We will see. I shall report here.
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