sharepoint based dashboards

i got ownership rights on the sharepoint site.   not surprised i still cant refresh the semantic model in the cloud nor on the desktop (trying this now but running forever) since tutu's theory that the list was broken is probably correct.      but somebody had to author this thing at one time and yet when i hit visualize (from integrate) and "create a report" i dont see anything useful in the tables (wanted to se a master list with sub tabs, i just see a shared maybe folder of what might be 2 tables, one with counts that wants to sum ids, the other maybe of modified something with a date hierarchy) pbi sets up/picks for me automatically.   when i hit search for key words in the master list im looking for, i get nothing.  how did the original author see the master/sub lists i need and what is that navigate m code command (i see on desktop in tyhe pbix i downloaded) about in the applied steps for sharepoint, is that a folder's guid pbi needs to be aware of to know what lists to use ?  that guid doesnt seem to match the ws name in the cloud whose name also has a guid.