Hi, welcome to Just answer
Sorry to hear about your issue
How old is your dishwasher ?
Yes, the flashing lights indicate a leak in the base...if you can pull the unit out and then lay it around 45 degrees on its side so that the water drains out completely...once the water has drained out the anti flood switch will reset itself and the machine should start to work again....also while the unit is unplugged check the drain pump assembly and make sure everything is clean in there...after all this is done try to run the unit again, if still it won't fill then it is the water inlet valve that will need replacement
Yes you can pull it out and check everything for any leaks/clogs
you can also remove the rear off the unit and clean the drain pump assembly completely
let me know how it goes