Qlik sense Data Upload problem

[Anonymous]

Hi,

I have copied the apps from my colleagues computer. I need to access the app's data and change it and upload new data. I am not able to do it. It always pops up as "Connection lost", try again.

I have tried to create new app and upload data. I still cant upload new data to new apps as it just keeps loading and the upload does not take place at all.

Please find below, the message that appear when i try to access the "Data Manager" page for existing apps.

Any help would be greatly appreciated.!

Thanks in advance