What does this mean?

[TheGameyFireBro105]

[deice]

if you need help with lua you're writing, you should probably also post the code itself to make it possible to debug.

if you want to know about the error itself, the gist is that lua has tables within which you can associate one value with another. it also has "nil", a special value different from the numerical 0 which signifies the lack of a value. this error happens when a nil value is attempted to be used as a table.

if it's being raised from a library (like in the screenshot) it's likely that something didn't load correctly or something is missing from your code.

[Hoeloe]

This looks like an error that can occur when you have a custom effect file and no corresponding graphic.

[TheGameyFireBro105]

fixed it.