Internal error: looking up invalid data on a dense spool.

[user_name_101]

Hi everyone, pretty new to Power BI but I am experiencing this issue below with a published data set on Power BI Service (Online):

The dataset and PBI were working completely fine yesterday 10/7 but then on 10/8 suddently this error occured for this one visual. When I am using the PBI Desktop version, there are no errors for the visual, but when I look at the PBI Service (Online) version of it, I get that error for that visual. So on desktop its fine but on the online version the visual error is there. The measure used for the visual includes a switch function, could that be a possible issue?

If anyone has had this problem in the last, some help/advice would be great, thank you!