Adding a device is not possible

Good day,

I have a trail licence now because I just want to test the system and see if the MDM works for us but I am unable to add an android device or manage it.

1- I have added a Group policy (Android Enterprise device policy) under

Policies > Android 

2- Under "Task bundles" > "Android" I have also created a task "Enroll" then I choose "Full device" and choosen the Policy that it was created in the previous step.

Now I am trying to add a device from device wizard but I do not see any tasks that I can choose and then I cannot add a device.

I get these options shown  

Enroll device with task bundle 

Enroll Sophos container with task bundle 

Enroll Sophos container with policy

Enroll Sophos Intercept X for Mobile with task bundle 

Enroll Sophos Intercept X for Mobile with policy

Can anyone please help me? I would like to test the system before the 30 days are over.

Many thanks,

Bero