No matching version found for @sencha/ext@^7.0.0

[senchastudent]

I tried following the readme.md instructions, after cd'ing into the client folder I ran npm install and encountered this issue:

npm WARN deprecated graceful-fs@1.2.3: please upgrade to graceful-fs 4 for compatibility with current and future versions of Node.js
npm ERR! code ETARGET
npm ERR! notarget No matching version found for @sencha/ext@^7.0.0
npm ERR! notarget In most cases you or one of your dependencies are requesting
npm ERR! notarget a package version that doesn't exist.
npm ERR! notarget
npm ERR! notarget It was specified as a dependency of 'client'
npm ERR! notarget

npm ERR! A complete log of this run can be found in:

The logs revealed this

1701 silly fetchPackageMetaData error for @sencha/ext-modern@^7.0.0 No matching version found for @sencha/ext-modern@^7.0.0
1702 http fetch GET 304 https://npm.sencha.com/@sencha%2fext-modern-theme-material 1372ms (from cache)
1703 silly fetchPackageMetaData error for @sencha/ext-modern-theme-material@^7.0.0 No matching version found for @sencha/ext-modern-theme-material@^7.0.0
1704 timing stage:rollbackFailedOptional Completed in 0ms
1705 timing stage:runTopLevelLifecycles Completed in 13010ms
1706 silly saveTree pwa@0.0.1
1706 silly saveTree +-- escape-string-regexp@1.0.5
1706 silly saveTree +-- express@4.17.1
1706 silly saveTree +-- minimist@1.2.0
1706 silly saveTree `-- sw-precache@4.3.0
1707 verbose type range
1708 verbose stack @sencha/ext: No matching version found for @sencha/ext@^7.0.0