Setup Connectivity Issues

Hi, I am new in this community.
Have bought the eufyCam 2C.
Installed the new firmware Home Base 2 works proper and has a good wifi connection via router Fritz!Box 7590 using 2.4GHz frequenz and data transfer 130Mbit/s. I am following all the instructions but can not connect the cam to the home base. Cams are full charged. Have also reseted the home base and the cams as well.
Still not able to connect. Any body with same experience, or can give some hint?
Thanks in advance,