Updated to 2.0.20 and got this error:

The mod Fluid level indicator (0.9.7) caused a non-recoverable error.
Please report this error to the mod author.

Error while running event Fluid-level-indicator::on_tick (ID 0)
LuaRenderObject API call when LuaRenderObject was invalid.
stack traceback:
[C]: in function 'index'
__Fluid-level-indicator/fli/fli.lua:151: in function 'fli_update'
Fluid-level-indicator/fli/fli.lua:266: in function <Fluid-level-indicator/fli/fli.lua:262>

Rolled back to 2.0.15 which was working but still getting the same error

Could you please list what other mods you are using?

It's the mod, if I disable it I no longer get the error. Looks like a few other people have the same issue with it

https://mods.factorio.com/mod/gridlines

I thought so...
I mentioned in another discussion, that the gridlines mod is touching the global rendering and the global storage outside of its scope. It also messes up other mods that render sprites, like Nixie tubes etc.

There is another mod: https://mods.factorio.com/mod/ChunkyChunks try this instead of gridlines, does something very similar and seems less buggy.

Thank you!