"DataTables warning " Error when searching a patient

Situation
Error when searching a patient, in this case “Test”, see screenshot:

OpenEMR Version

Version 7.0.0

Any other info required to troubleshoot?
THanks!

I have seen this also in the past when I have tried an operation that failed for some reason (because I canceled it prematurely or something like that). Logging out and back in would correct the issue for me.
–RBL