Player can't see map

Player can't see map, only can see their token and no one else's. Can see the loading screen, no extensions, on tablet. Tried refreshing, logging in and out, kicked them and joined again. Still only black. 

Hi Mr. Blue! Here's a "why can't my players see anything?" checklist. The important thing is to verify. Don't assume. This list is written with GMs in mind, but can help players work through issues with their GM. The token is on the VTT It is assigned to the character The player has control over the character The token is on the Token/Object layer It is not blocked off by DL lines from seeing the immediate surroundings Make sure the player is looking at their token's immediate area. Shift-Click and hold on the token to pull the player's view to that area. If Fog of War is being used, that the area the token is in has been cleared The player has not been Split from the Party (Check the Help Center if this is unfamiliar) If Dynamic Lighting of any kind is being used: The token has sight turned on The token has a light source, or Nightvision (UDL) or personal light (LDL) In UDL it may be necessary to move the token one square to get everything working, or in extreme cases, refresh the (user's) page. Can you see a rotating cube in this URL ? If not, the browser needs to be WebGL compatible (99%+ are).

I don't have dynamic lighting, everything about the character/token is already assigned complete control by the player, and even with fog of war turned off they still can't see anything. They are using a tablet so I'm wondering if it's something to do with that? Although it was working completely fine for the past couple of weeks that we've played, so I'm wondering if Roll20 updated something and completely broke the service for his end. 

Can your player see a map on any other page? (just in case this is bad cached data). Can they see the map if they use a different browser? A private browsing page? a different device? Are they using something like an antivirus program that might be blocking the image server? Not knowing the specs of the tablet or the map, is it an exceedingly large image? What is the nature of the tablet? This is not a widely reported issue, so I doubt it is an issue with the general Roll20 code base, particularly because you are not using dynamic lighting. The best recourse is to examine game settings and the end user situation to determine why things are not resolving.