Error Building from Source on Ubuntu 26.04

[gstanden]

Hi thank you when i try to build from source on Ubuntu 26.04 I get the following error on the "npm install" step.

401 Unauthorized - GET https://npm.pkg.github.com/download/@parallel-7/slicer-meta/1.1.0-20251121155836/9338b2ad8e107d4deabeb4ddec5746df51990d66 - authentication token not provided

The entire stack is:

gstanden@ThinkPad-P69:~/Downloads/FlashForgeWebUI$ npm install
npm WARN deprecated inflight@1.0.6: This module is not supported, and leaks memory. Do not use it. Check out lru-cache if you want a good and tested way to coalesce async requests by a key value, which is much more comprehensive and powerful.
npm WARN deprecated glob@7.2.3: Glob versions prior to v9 are no longer supported
npm ERR! code E401
npm ERR! 401 Unauthorized - GET https://npm.pkg.github.com/download/@parallel-7/slicer-meta/1.1.0-20251121155836/9338b2ad8e107d4deabeb4ddec5746df51990d66 - authentication token not provided

npm ERR! A complete log of this run can be found in:
npm ERR! /home/gstanden/.npm/_logs/2026-08-07T04_42_43_971Z-debug-0.log
gstanden@ThinkPad-P69:~/Downloads/FlashForgeWebUI$

How would this be fixed ? Thanks Gil

[gstanden]

actually seems found the solution to that one
rm package-lock.json
made the 401 error go away