Exception when using npm-upgrade : TypeError: Invalid Version: undefined

[jogibear9988]

see:

PS D:\csharp\git\github\common\astexplorer\website> npm-upgrade
Checking for outdated production, optional, development, peer and bundled dependencies for "D:\csharp\git\github\common\astexplorer\website\package.json"...
[====================] 160/160 100%
TypeError: Invalid Version: undefined
    at new SemVer (C:\Users\jkuehner\AppData\Roaming\npm\node_modules\npm-upgrade\node_modules\semver\classes\semver.js:38:13)
    at outside (C:\Users\jkuehner\AppData\Roaming\npm\node_modules\npm-upgrade\node_modules\semver\ranges\outside.js:12:13)
    at Object.ltr (C:\Users\jkuehner\AppData\Roaming\npm\node_modules\npm-upgrade\node_modules\semver\ranges\ltr.js:3:42)
    at isUpgradeable (C:\Users\jkuehner\AppData\Roaming\npm\node_modules\npm-upgrade\node_modules\npm-check-updates\lib\versionmanager.js:120:17)
    at C:\Users\jkuehner\AppData\Roaming\npm\node_modules\npm-upgrade\node_modules\npm-check-updates\lib\versionmanager.js:65:67
    at C:\Users\jkuehner\AppData\Roaming\npm\node_modules\npm-upgrade\node_modules\lodash\lodash.js:13658:16
    at basePickBy (C:\Users\jkuehner\AppData\Roaming\npm\node_modules\npm-upgrade\node_modules\lodash\lodash.js:3825:13)
    at Function.pickBy (C:\Users\jkuehner\AppData\Roaming\npm\node_modules\npm-upgrade\node_modules\lodash\lodash.js:13657:14)
    at C:\Users\jkuehner\AppData\Roaming\npm\node_modules\npm-upgrade\node_modules\lodash\lodash.js:4430:28
    at arrayReduce (C:\Users\jkuehner\AppData\Roaming\npm\node_modules\npm-upgrade\node_modules\lodash\lodash.js:697:21)
    at baseWrapperValue (C:\Users\jkuehner\AppData\Roaming\npm\node_modules\npm-upgrade\node_modules\lodash\lodash.js:4429:14)
    at LodashWrapper.wrapperValue (C:\Users\jkuehner\AppData\Roaming\npm\node_modules\npm-upgrade\node_modules\lodash\lodash.js:9114:14)
    at Object.upgradeDependencies (C:\Users\jkuehner\AppData\Roaming\npm\node_modules\npm-upgrade\node_modules\npm-check-updates\lib\versionmanager.js:73:6)
    at Object.<anonymous> (C:\Users\jkuehner\AppData\Roaming\npm\node_modules\npm-upgrade\lib\commands\check.js:154:51)
    at runMicrotasks (<anonymous>)
    at processTicksAndRejections (node:internal/process/task_queues:96:5)
PS D:\csharp\git\github\common\astexplorer\website> 

[jogibear9988]

I used it inside of: https://github.com/fkling/astexplorer/tree/master/website