Invalid visualization

[Purch]

Latest version with sense June 2018 is not working properly. It states:
Invalid visualization
The visualization was not found on the server

Crome console gives an error: 40.8e64cfe8993264ccfc07.js:576 Error in extension 'extensions/TabbedContainer_v2/TabbedContainer_v2': Can not use internal module 'filesaver'.

Problem is that something is fetched from internet side by extension on Sense June 2018. Extension works if I enable internet proxy on the server.