16x2 LCD problem on STM32F4

[M.Trinacty]

Hi,

I im trying to run simple character lcd, without core module, but keep getting some random chars, or even just blocks, but it keeps blinking.
I followed schematic from uCApps page for STM32F4, but the part to set Luminance i dropped and simply connected it to ground, Could be this a problem ?

Tried to connect from scratch everything a few times, but still getting the same error...

Please, if anyone has a tip what could be the problem, mine is that as i am lame at electronics, somewhere is connection problem maybe, im bit confused about the resistor array.
Here is a video showing the behavior of LCD

https://drive.google.com/open?id=1CPgCp6t-rewshbGq7Yprdonu_htadADo

Thanks,

Martin