According to the screenshot, I think you cannot access the SQL Analysis Services Server (SSAS).
You can open Event viewer on your SQL Server and see the following error in the Application folder :
Please the following steps:
1)Go to SharePoint Central Administration >> click "Manage service applications"
2)On Manage service applications page, select "Project Server Service Application">>select the Project Web App Instance, then click "Manage" option
3)Click “OLAP Database Management” >> select the OLAP Database Instance and click "Build Now" button
Thanks,
Echo Du
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