Error: Invalid value "iife" for option "output.format"

[wktdev]

Describe the bug I tried to import using NPM and got an error. I deleted the p5 packages and installed pnpm. When I run my svelte app I get the errors below.

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[!] Error: Invalid value "iife" for option "output.format" - UMD and IIFE output formats are not supported for code-splitting builds. https://rollupjs.org/guide/en/#outputformat Error: Invalid value "iife" for option "output.format" - UMD and IIFE output formats are not supported for code-splitting builds. at error (/Users/williamturner/Desktop/new_svelte/my-svelte-project/node_modules/.pnpm/[email protected]/node_modules/rollup/dist/shared/rollup.js:198:30) at validateOptionsForMultiChunkOutput (/Users/williamturner/Desktop/new_svelte/my-svelte-project/node_modules/.pnpm/[email protected]/node_modules/rollup/dist/shared/rollup.js:16076:16) at Bundle.generate (/Users/williamturner/Desktop/new_svelte/my-svelte-project/node_modules/.pnpm/[email protected]/node_modules/rollup/dist/shared/rollup.js:15910:17) at processTicksAndRejections (node:internal/process/task_queues:96:5) at /Users/williamturner/Desktop/new_svelte/my-svelte-project/node_modules/.pnpm/[email protected]/node_modules/rollup/dist/shared/rollup.js:23833:27 at catchUnfinishedHookActions (/Users/williamturner/Desktop/new_svelte/my-svelte-project/node_modules/.pnpm/[email protected]/node_modules/rollup/dist/shared/rollup.js:23247:20) at async Promise.all (index 0) at Task.run (/Users/williamturner/Desktop/new_svelte/my-svelte-project/node_modules/.pnpm/[email protected]/node_modules/rollup/dist/shared/watch.js:246:32) at Watcher.run (/Users/williamturner/Desktop/new_svelte/my-svelte-project/node_modules/.pnpm/[email protected]/node_modules/rollup/dist/shared/watch.js:173:13)