ArtSelect is not defined

[ottoloot]

Describe the bug
The popup that says "Apply the same art to token?" results in an error, even though it does appear to work. I get an error and the prompt won't disappear until I close it, but it does seem to set the same artwork.

Screenshots

FoundryVTT 351
PF2E 7.11.2

My Fix:

I changed
const n=Object.values(ui.windows).filter((e=>e instanceof ArtSelect));

to
const n=Object.values(ui.windows).filter(e=>e?.constructor?.name==="ArtSelect");

in the token-variants.js

[ottoloot]

Bug still exists with version 6.1.2