Reset GE gsd4060r15ss with blinking Start/Reset light

Searched the forum and google and couldn’t find an answer, but apologies if I missed it. Our GE dishwasher (gsd4060r15ss) started beeping during a wash cycle and was able to restart. However, now the Start/reset button is flashing, and we can’t start a wash cycle. I turned off the power at the switch and left it off for a while, but when turned back on it goes back to flashing. Any thoughts on how to reset it? I don’t see anything in the manuals I have found online. Thanks in advance for your help.