Error loading dependencies with scattergl


I’m getting an “Error loading dependencies” when using scattregl. The same configuration runs well with the normal scatter function. I have checked my browser setting with which supports webgl.

The console error log shows :
TypeError: dash_render.min.js:18 Cannot read property 'length' of null at new v (plotly.-1.45.0.min.js:7) ....

Any idea about this error?

Thanks for your help