Very simple fix, Cmdrs.
There is a check in the code to verify whether the system data is valid (at least one body or station in the system). The text box will be highlighted in red if that criteria is not met. We had an issue a few revisions back where system data in the local eddi.sqlite file was archived with no body or station data. This has since been fixed but the bad data is still in your eddi.sqlite file.
Delete the eddi.qslite file in your AppData/Roaming/EDDI folder, re-start EDDI, and it should now populate the next time you try with no problem.
I will also look into how can we can further protect against this particular edge case.