not downloading link monitor APK

[deadpoolcode]

NRF connect 2.1.0

OS: Ububtu 16.04

when I try to download linkmonitor I fet: 

Unable to install: Unable to download registry.yarnpkg.com/pc-nrfconnect-linkmonitor. Got status code 404

I can dowwnload other applications 

[deadpoolcode]

I also get error 404 regarding "getting started assistant": 

Unable to install: Unable to download registry.yarnpkg.com/nrf-framework-courses. Got status code 404