Hey there, when I try to build the win32 version of my app, I receive this error

Error: buffer is not ico
at parseIco (/Users/loaner/opat-presentation/native/node_modules/electron-builder/src/winPackager.ts:202:11)
at /Users/loaner/opat-presentation/native/node_modules/electron-builder/src/winPackager.ts:185:25
at [object Generator].next (native)
at /Users/loaner/opat-presentation/native/node_modules/electron-builder/node_modules/fs-extra-p/node_modules/fs-extra/node_modules/graceful-fs/graceful-fs.js:43:10
at /Users/loaner/opat-presentation/native/node_modules/electron-builder/node_modules/read-package-json/node_modules/graceful-fs/graceful-fs.js:43:10
at FSReqWrap.oncomplete (fs.js:82:15)
From previous event:
at tsAwaiter (/Users/loaner/opat-presentation/native/node_modules/electron-builder/src/awaiter.ts:10:51)
at Object.build (/Users/loaner/opat-presentation/native/node_modules/electron-builder/src/builder.ts:30:59)
at Object. (/Users/loaner/opat-presentation/native/node_modules/electron-builder/src/build-cli.ts:41:2)
at Module._compile (module.js:409:26)
at Object.Module._extensions..js (module.js:416:10)
at Module.load (module.js:343:32)
at Function.Module._load (module.js:300:12)
at Function.Module.runMain (module.js:441:10)
at startup (node.js:139:18)
at node.js:968:3

The Mac and Linux versions of my project build just fine. At first I thought this error might be related to my "iconUrl", but haven't had any luck switching it. Has anyone else run into this issue?