Leire Diez Larrea unlikely that you get this "glued" back together. I suggest that you replace it. Parts are available at places [https://www.aliexpress.com/item/3256803205471101.html?gatewayAdapt=4itemAdapt|like this] and on here [https://www.camerahouse.com.au/olympus-battery-door-for-om-d-e-m10-mark-ii-black-camera|as well]
Depending on where you are, you can also check for original Olympus parts [https://www.olympus-europa.com/site/en/c/cameras_accessories/pen_om_d_cameras_accessories/pen_om_d_other_accessories/battery_compartment_covers/index.jsp|right here]