I have been struggling to enter the details of a 2.4 GHz Network on the Deco app. Though it is indicated that "Password must be at least 8 characters", no conceivable combination or number of numbers, letters or characters is allowed.

Considering that without the (extremely barebones and unhelpful app) the device cannot be activated and used, I am wondering why I shouldn't return it as useless. Any possible solution before I do so?

The device was purchased in Greece.