Gl-x750v2 has wifi, but esp32 cannot connect to it

my gl-x750v2 opens a 2.4 GHz and 5 GHz wifi with identical credentials (wifi name and psw) and i can connect to it just fine with laptop and smartphone.
Using two differen ESP microcontroller i cannot connect to it.
Why is this, what can i check? Security is WPA-PSK
Thanks for your help

Can you pls choose psk-mixed encryption?