According to Space.com
"...less than 2 seconds before liftoff, just after 5:30 p.m. EDT (2230 GMT and 4:30 p.m. local Texas time), SN8 detected something abnormal with one or more of its three Raptor engines and automatically aborted the flight."
"It's unclear at the moment when SN8 will get its next chance to fly; that depends on what caused the abort and how difficult it will be to fix. But there are launch windows available on both Wednesday and Thursday (Dec. 9 and Dec. 10)..."
"...less than 2 seconds before liftoff, just after 5:30 p.m. EDT (2230 GMT and 4:30 p.m. local Texas time), SN8 detected something abnormal with one or more of its three Raptor engines and automatically aborted the flight."
"It's unclear at the moment when SN8 will get its next chance to fly; that depends on what caused the abort and how difficult it will be to fix. But there are launch windows available on both Wednesday and Thursday (Dec. 9 and Dec. 10)..."