After upgrading to Plotly 5 (either 5.1.0 or 5.2.2, or 5.3.1, 5.4.0), I am seeing the error (given below) for various plots, at random. The issue goes away if Plotly is downgraded to 4.14.3.

File "plotly/basedatatypes.py", line 3952, in _index_is
raise ValueError("Invalid value")

Here are relevant reports from me and other users

• https://community.plotly.com/t/valueerror-invalid-value-in-basedatatypes-py
• https://community.plotly.com/t/inconsistent-callback-error-updating-scatter-plot
• https://community.plotly.com/t/unknown-invalidvalue-error/

I have a Dash app that plots several graphs. When the Dash app starts, some plots do not get displayed, and I see the error. This only occurs on the initial startup of the app. When the webpage is refreshed, the error does not re-appear, and all plots get displayed without errors.

If I downgrade to Plotly 4.14.3, the issue goes away entirely.