Modelling tab not working

hi, Anonymous 

You are using live connections in this report.

https://docs.microsoft.com/en-us/power-bi/desktop-directquery-about#live-connections

For this connection, you could directly connected to the data model, so all these modeling processes could be done in the basic data model.

here is the document for you to learn

https://radacad.com/live-connection-when-power-bi-comes-hybrid

Best Regards,

Lin