Hi Fons!
Here a big fan of Pluto, but in a learning curve on Julia/Pluto.
I tried your pluto-on-binder.glitch.me with a very small Pluto notebook example from my GitHub to test notebook shared online. It works!
But, with a more complex (not so complex) Pluto notebook, it gives me an error when Pluto starts running. I think it may be Julia or Pluto versions on Binder, it gives this error when installing the packages:
Any idea? Please, take time on this issue only if it is simple to solve… because you should be kept on track on important Pluto things 
Ricardo
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