Now what would cause that?
Yesterday it was working… today not. 
And you haven’t touched the website?..it just stopped working? - strange if so…never had that before.
Maybe fix it and upload the fixed version?
I just open the project in I made in v5.2.3 and it does not work.
I then open the prevision version and it worked!! Why I have no idea.
This is the one that works
Very strange - could be a @Norm question !
Yeah just re-built it. Now it’s working
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Too late now, but first port of call, check the browser inspector for errors.