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%jigsaw not showing block in workspace
When executing the example Jigsaw in IPython.ipynb, the blocks don't show and a warning is issued:
This happens when executing on my own server.
I have also tried extracting the html code which is generated and opening it in the browser. I get the same result: blockly.html.zip
Could it be related to https://github.com/Calysto/metakernel/issues/170 ? The installation of the chromium extension Ignore X-frame header seems to solve the issue for me. However, I couldn't have it working in firefox, but I didn't try for too long.