If you see a black background, but you can still see objects, the background may have been accidentally deleted (or not saved in the case of using the background painter tool). If you own the Space and you have a copy of the background, you can try uploading it again using the button in the upper right corner of the Mapmaker. If you used the Painter Tool, you will need to recreate the background, click the check mark and additionally click the save icon before reloading the space. Otherwise, the best course of action may be to create a new space. If that doesn't solve your issue, please email us at email@example.com and we'll try to get to the bottom of why this is happening.
If your entire screen is black and you do not see any objects, there is a high possibility that you were banned from the space. Bans are done by IP address. This means if you tested the ban function on yourself or a member of your household, you may have banned yourself from your space. For more information and available options moving forward, please see our page on Banning by clicking here.