Incomplete visualization / Invalid visualization

[Eston_Sello]

Good day,

Please assist, I have imported a document in my Qlik sense server and I get Incomplete visualization error on my line charts. I imported three Qliksense extensions(sense-navigation, Qlik-Sense-Reload-Button and Line-Widgets) but it doesn't resolve the error but it works fine on my Qlik sense desktop. 

Thanks in advance.

[Or]

Check your visualizations. We can't tell what's wrong without seeing them...