404 not found with Qlik Sense Extension

[ziabobaz]

Hello,

I am trying to load the 3d party KF Table extension I found on the web (GitHub - KFredberg/KFTable: Qlik Sense extension), but it won't load with the following message

I opened the DevHub to try to do something and received the following error:

I am not a programmer at all and it does not tell me anything. Can you please point out at least the direction where I should look for?

I am using QS Desktop.

Thank you!