To correct this issue, you will need to reseat the SkyTab Glass device inside the R15 case.
Press against the bottom corners of the case until the bottom of the tablet is fully exposed, followed by sliding the tablet out of the case.
While you have the tablet removed, check the connections on both the case and device for damage. Carefully clean the connections if necessary.
To insert the device, slide your SkyTab Glass into the case, top side first as shown in the picture.
Then firmly press down on the bottom corners of the tablet until it is fully housed inside the case.
If this does not correct your issue, please contact Support for further assistance.