ng deploy now generates this message using Angular 18:

❌ An error occurred when trying to deploy:
The "path" argument must be of type string. Received undefined

No problem with build:

📦 Building "my-app"
📦 Build target "my-app:build:production"
Initial chunk files | Names | Raw size | Estimated transfer size
chunk-REPPZAOL.js | - | 634.01 kB | 134.41 kB
styles-2S7CTVXQ.css | styles | 149.86 kB | 9.41 kB
main-3JVGATQH.js | main | 78.06 kB | 20.35 kB
polyfills-EONH2QZO.js | polyfills | 34.54 kB | 11.32 kB

                  | Initial total | 896.47 kB |               175.48 kB

Lazy chunk files | Names | Raw size | Estimated transfer size
chunk-5FDAASR2.js | admin-module | 223.77 kB | 67.44 kB

Application bundle generation complete. [5.396 seconds]

▲ [WARNING] bundle initial exceeded maximum budget. Budget 512.00 kB was not met by 384.47 kB with a total of 896.47 kB.

Output location: (...)