Apps that rely on the Lumenize library are no longer functional and may show blank application panes.
Looking at the dev tools console reveals the following error:
ⓧ Failed to load resource: the server responded with a status of 403 () Lumenize-min.js:1
The CDN hosting the Lumenize library is no longer valid.
To resolve this it is important to first know which version of Lumenize your app is referencing. You can search your app for "googleapis" and find the version in the URL as follows
https://storage.googleapis.com/versions.lumenize.com/v0.7.3/Lumenize-min
Use the version to find your replacement address below:
Locate the following line:
https://storage.googleapis.com/versions.lumenize.com/v0.5.5/Lumenize-min.js
And replace it with the following URL:
https://cdn.rawgit.com/lmaccherone/Lumenize/v0.5.5/deploy/Lumenize.js
Locate the following line:
https://storage.googleapis.com/versions.lumenize.com/v0.7.3/Lumenize-min
And replace it with the following URL:
https://cdn.rawgit.com/lmaccherone/Lumenize/v0.7.3/deploy/Lumenize.js