In my WordPress blog it does not work

Hello Gra4 user can someone help me ?! I wanted to install Gra4 on my WordPress blog, but on the side / gra4 nothing is displayed and the backend of WordPress, there are no settings to Gra4. I use a default theme and I do not know why.

Can anyone give a hint how I can install the social network to WordPress me. Actually, I’ve done everything right.