Power BI Performance- Data in reports not loading

Hi,

Many users in our organization are complaining about the reports not loading and the spinner is just spinning when they open a report on the server for a long time. Either the user gets an error saying "Something went wrong" or the spinner is continously spinning for hours without showing any data. The reports are connected to Tabular models (SSAS) as a data source. We have observed that the dashboards connected to Teradata directly are not facing this issue, but the ones connected to SSAS are.

Also, these issues are for some users and only few dashboards out of many. This is affecting the performance of the reports. Can someone please help resolve this issue or know if there are many others facing the same issue? Also, please note that we are not facing this issue on Power BI desktop.

Thanks