Hello,
The SPRINGBOOT data were swiped from memory (possibly due to a patch and reboot of the SAS server). Someone needs to load the on-disk copy of the data back into memory. The on-disk copy presumably has the extension *.sashdat (in-memory format) or possibly also *.sas7bdat or possibly also *.csv. ( If *.sashdat, look in the CASLIBs you have. )
That loading back into memory can be done with PROC CASUTIL or with PROC CAS or via point-and-click in the SAS Environment Manager. (It cannot be done from within SAS Visual Analytics!) The SPRINGBOOT CAS-table should also be promoted so that it is available in all CAS sessions (and not only to the session were it was created / uploaded). I recommend finding the one responsible for maintaining that data source. He / she will know what to do. Maybe you don't even have sufficient permissions to do it yourselves as you appear to be a "report consumer" (with all due respect).
BR, Koen
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