All of a sudden I am unable to selecte vias on a PCB that is almost completed. I have tried checking the via box in the right toolbar under the Filter subtab but nothing changed. Even when I try selecting everthing (Ctrl+A) the vias dont get selected. I have tried exporting the PCB and then re-importing it but the issue persisted. In a new PCB, I can place new vias and select them but in the old PCB I cannot do this. I am using EasyEDA Pro.

Edit 1: I cannot select through-hole pads or slot regions. Seems to be something affecting multilayer objects.