Error 127 on loading game in browser

I’m working on project but every time I make a build from my project to webGL I receive an error when I try to run it in the browser. The game is embedded in the browser, One of my friends manages to play the game but the other 3 cannot launch the game and receive the error.

The error is at the second last line:

var Module = { TOTAL_MEMORY: 134217728, filePackagePrefixURL: "Release/", memoryInitializerPrefixURL: "Release/", preRun: [], postRun: [], print: (function() { return function(text) { console.log (text); }; })(), printErr: function(text) { console.error (text); },

And the error is:

(censored)/:34 127 Module.printErr @ (censored)/:34 UnityConfig.js:76 Invoking error handler due to Uncaught abort(127) at Error at jsStackTrace (http:// (censored)/WebGLBuild/Release/WebGLBuild.js:1:22020) at stackTrace (http:// (censored)/WebGLBuild/Release/WebGLBuild.js:1:22203) at abort (http:// (censored)/WebGLBuild/Release/WebGLBuild.js:36:45413) at Array.Lgm (http:// (censored)/WebGLBuild/Release/WebGLBuild.js:29:69844) at PPb (http:// (censored)/WebGLBuild/Release/WebGLBuild.js:9:69514) at MPb (http:// (censored)/WebGLBuild/Release/WebGLBuild.js:9:68430) at pWd (http:// (censored)/WebGLBuild/Release/WebGLBuild.js:16:271967) at Buc (http:// (censored)/WebGLBuild/Release/WebGLBuild.js:19:1026834) at ATINIT.push.func (http:// (censored)/WebGLBuild/Release/WebGLBuild.js:1:30379) at callRuntimeCallbacks (http:// (censored)/WebGLBuild/Release/WebGLBuild.js:1:24476) If this abort() is unexpected, build with -s ASSERTIONS=1 which can give more information.

Now my question is how can I solve this error? I have tried to Google how to use -s ASSERTIONS=-1 but I did nog manage to find a solution how to use is.