I'm trying to upgrade apps that were created in 2.12 to the latest version of WAB, 2.16. I am inputting the following commands as per Upgrade apps—ArcGIS Web AppBuilder (Developer Edition) | ArcGIS for Developers to upgrade all my apps.
C:\ArcGIS Web AppBuilder Dev Edition\Web AppBuilder 2_16\WebAppBuilderForArcGIS\server>node_x64 upgrade C:\ArcGIS Web AppBuilder Dev Edition\WebAppBuilderForArcGIS<SPAN class="line-numbers-rows"><SPAN></SPAN></SPAN>
Which spits out this result:
[2020-07-14T12:08:25.982] [INFO] upgrade - Builder folder: C:\ArcGIS
[2020-07-14T12:08:25.987] [INFO] upgrade - App id: Web
[2020-07-14T12:08:25.995] [ERROR] app - { message: 'Invalid Path.' }<SPAN class="line-numbers-rows"><SPAN></SPAN><SPAN></SPAN><SPAN></SPAN></SPAN>Just need a little guidance as to what is going on here. I am happy to provide additional information as needed!