I have an answer from my support ticket and here it is:

Hi John,

Thank you for contacting us

We are aware there is a problem with free boosters on facebook app.

Our developers are working on this issue. We hope they will find a solution for this as soon as possible.

PS: Top Eleven tip ‘’Do not forget to set penalty takers order’’

Thank you for your patience and effort to improve our game.

Top Eleven Support Team