Import/Direct Query report got error when a open on Power BI Report Server

I got error when I opened the power BI reports, whiche are import/directlyquery.

btw My Report Server and Desktop both are 2018 version.

So, I tried other post suggestion, changed the datasource crentdential to the SQL crendential,

But It cannot solve my problem....

My datasource and power bi report server are both on same machine.

Any ideas?