Plotly fails to build: no "src_attrs.csv" file

[GlenHenshaw]

Using Julia 1.6.1 on macOS 11.3.1:

 julia> Pkg.precompile()
 Precompiling project...
   ✗ Plotly
   1 dependency successfully precompiled in 7 seconds (274 already precompiled)

 ERROR: The following 1 direct dependency failed to precompile:

 Plotly [58dd65bb-95f3-509e-9936-c39a10fdeae7]

 ERROR: LoadError: ArgumentError: Cannot open '/Users/glenhenshaw/.julia/packages/PlotlyJS/h3GxO/deps/src_attrs.csv': not a file

And, indeed, there is no such file at the location.