After 14 successive iterations in EA, and equally successful Chrome previews, all 14 were inaccessible to the error above.
I don't know why, I don't know the repercussions, but the following allowed me to load the file into EA again:
In the _edge.js file - many fonts. One I do not even recognize.
I deleted all highlighted in blue.
Result:
Save. Viola.
As you see, the actions code javascript was fine all along. The lower left corner "No error" in the actions code.
If you have more info on possible effects, please contribute below.