HELP! WebGL Error on play

Mirrador_1

Hi,

We're trying to build out an existing project that works fine in standalone but as a WebGL we get an error. Unity creates the folder and the index/html but upon running it the browser reports the following:

An error occured running the Unity content on this page. See your browser's JavaScript console for more info. The error was:
uncaught exception: abort(-1) at jsStackTrace@blob:null/1bf406fd-8295-43b0-8574-058b8dc5389b:1278:13
stackTrace@blob:null/1bf406fd-8295-43b0-8574-058b8dc5389b:1295:22
abort@blob:null/1bf406fd-8295-43b0-8574-058b8dc5389b:3926588:44
__Z25RegisterClass_NetworkViewv [RegisterClass_NetworkView()]@blob:null/1bf406fd-8295-43b0-8574-058b8dc5389b:14544:75
__Z18RegisterAllClassesv [RegisterAllClasses()]@blob:null/1bf406fd-8295-43b0-8574-058b8dc5389b:3844964:2
__Z26InitializeEngineNoGraphicsv [InitializeEngineNoGraphics()]@blob:null/1bf406fd-8295-43b0-8574-058b8dc5389b:862699:2
__Z26PlayerInitEngineNoGraphicsRKNSt3__112basic_stringIcNS_11char_traitsIcEENS_9allocatorIcEEEES7_ [PlayerInitEngineNoGraphics?S(undefined?N?&)]@blob:null/1bf406fd-8295-43b0-8574-058b8dc5389b:855826:8
_main@blob:null/1bf406fd-8295-43b0-8574-058b8dc5389b:1352807:8
asm._main@blob:null/1bf406fd-8295-43b0-8574-058b8dc5389b:3923993:8
callMain@blob:null/1bf406fd-8295-43b0-8574-058b8dc5389b:3926453:15
doRun@blob:null/1bf406fd-8295-43b0-8574-058b8dc5389b:3926511:42
run/<@blob:null/1bf406fd-8295-43b0-8574-058b8dc5389b:3926522:7


Does anyone have any idea what this means or any experience of this?

Many thanks

Andy