So I kept seeing a triangle with a ! in it [b]

[Cristiana]

I clicked it while I was on the grid and this popped up:

content.min.js:2 [Deprecation] Element.createShadowRoot is deprecated and will be removed in M73, around March 2019. Please use Element.attachShadow instead. See https://www.chromestatus.com/features/4507242028072960 for more details.

It drew up the cntl + shift + I - inspect page block and that is what it said as the error message for the grid.