Fog of War - players see only white areas and tokens, not map

We have played a session of "Hidden Shrine of Tamoachan". I'm working with the Fog of War (FoW). Everything worked fine in the last session.

We just started a new session. My players see only white areas and their tokens where I have revealed the FoW - not the map.

For me as the GM, things appear fine. When I join as player, I have the same problem as my players. (When I re-join as GM, it goes away.) I have tried resetting the FoW and revealing areas again, same problem. I have tried hiding areas and revealing them again, same problem. Switching around between layers doesn't change anything. The problem persists under Firefox and Chrome (at least for me). Screenshots for what I see as a GM and as a player are attached.

I'd like for my players to see the revealed map again. Any thoughts?

EDIT: it looks like this report from two days ago is the same problem: https://app.roll20.net/forum/permalink/8425781/

ANOTHER EDIT: below is the Firefox console log I get when I log into my GM account and re-join as a player.

Firebase Offline app.js:552:28448

Player -M3aKoDonZ3UHypAqLDf is offline... app.js:559:27707

Firebase Online app.js:552:28237

Content Security Policy: The page’s settings blocked the loading of a resource at inline (“script-src”). editor:12:1

Content Security Policy: The page’s settings blocked the loading of a resource at inline (“script-src”). editor:13:1

JQMIGRATE: Logging is active jquery.migrate.js:20:10

Content Security Policy: The page’s settings blocked the loading of a resource at inline (“script-src”). 3 jquery-1.9.1.js:1444:6

Content Security Policy: The page’s settings blocked the loading of a resource at inline (“script-src”). 3 jquery-1.9.1.js:1450:5

This page uses the non standard property “zoom”. Consider using calc() in the relevant property values, or using “transform” along with “transform-origin: 0 0”. editor

CAMPAIGN ID: 6502583 startjs:15:9

70 app.js:552:26453

TOUCH SUPPORTED: false app.js:554:15373

USING WEBGL ACCELERATION... app.js:554:15813

WEBGL STARTUP SUCCESS app.js:554:16286

Custom Sheet Translation app.js:556:17906

RTCIceServer.url is deprecated! Use urls instead. 3 app.js:278

Loading Custom character sheet. app.js:574:12565

Including compendium template css. app.js:574:12682

tuts loaded tutorial_tips.js:7:10

Invalid URI. Load of media resource  failed. editor

unreachable code after return statement ffmpeg-worker-webm.3.js:153:13433

Starting up WEB WORKER sheetsandboxworker.js:682:10

unreachable code after return statement ffmpeg-worker-webm.3.js:164:111617

unreachable code after return statement ffmpeg-worker-webm.3.js:183:15520

unreachable code after return statement ffmpeg-worker-webm.3.js:187:17706

unreachable code after return statement ffmpeg-worker-webm.3.js:187:19502

unreachable code after return statement ffmpeg-worker-webm.3.js:189:21299

unreachable code after return statement ffmpeg-worker-webm.3.js:190:21237

unreachable code after return statement ffmpeg-worker-webm.3.js:194:17922

unreachable code after return statement ffmpeg-worker-webm.3.js:194:39367

unreachable code after return statement ffmpeg-worker-webm.3.js:197:71233

Final page load. app.js:563:18016

Auth'ed. app.js:561:18867

Go post auth! app.js:561:19064

initial setup app.js:561:19201

joining game... app.js:561:28321

Player -M3aKoDonZ3UHypAqLDf is offline... app.js:559:27707

THREE.WebGLRenderer 69 app.js:228:29039

Full load page! 7 app.js:558:21774

We have 7 pages app.js:561:20321

Player -M3aVGw5xcqG80qjvA7R is offline... app.js:559:27707

Player -M3aWzfGYOy6wm711eQG is offline... app.js:559:27707

Player -M3ytIlkFvaWwH93aBLG is offline... app.js:559:27707

Player -M40Chn7NfQvZbCNkESj is offline... app.js:559:27707

Player -M43W0QmEUJQW5MDPeip is offline... app.js:559:27707

Player -M43eYYPnS7cHipKfUV7 is offline... app.js:559:27707

Successfully compiled asm.js code (total compilation time 2333ms) ffmpeg-worker-webm.3.js

Player -M442cXyTaXTyqKe2eDK is offline... app.js:559:27707

Deferred finish joining... app.js:561:28411

Firebase Online app.js:552:28237

This site appears to use a scroll-linked positioning effect. This may not work well with asynchronous panning; see https://developer.mozilla.org/docs/Mozilla/Performance/ScrollLinkedEffects for further details and to join the discussion on related tools and features! editor

Could not load image from https://s3.amazonaws.com/files.d20.io/marketplace/254272/wC0hptBr_OgVP0VojolhGg/thumb.png?1487379462&1490327703 app.js:552:7889

Could not load image from https://s3.amazonaws.com/files.d20.io/marketplace/254363/X2tZFRPzmDNC5aMJKDW14w/thumb.png?14878242735&1490327914 app.js:552:7889

Could not load image from https://s3.amazonaws.com/files.d20.io/marketplace/254362/aNGVWIYb275dS1Mzukjf8A/thumb.png?1487824273&1490327913 app.js:552:7889

Debounced init page! 2 app.js:554:28817

Debounced init page! app.js:554:28817

i'm having a similar issue. i'm a member and we're using a mix of expansions and my own art uploads. tokens only show up if the player manages to touch it and if the player is listed as allowed to edit/move. so none of the monster tokens show up, background map is black. we got it to work using pc but still not working on mobile browser. it's just black background with the tokens they've touched visible

While you wait for a reply from Roll20, make sure the map did not get moved to the GM Layer by accident.

Rabulias said:

While you wait for a reply from Roll20, make sure the map did not get moved to the GM Layer by accident.

Uh-oh. This is embarrassing. That is precisely what seems to have happened. The map was on the GM layer, and when I moved it to the map layer, it became visible to my players. Thanks a lot!

So this issue can be marked as resolved.

Don't be too embarrassed; it is easy to make that mistake. Glad this helped!