Fake News. That is not what the report says
1) The secretary of state’s advisory stated that the flagged records should all be considered “WEAK” matches.
2) The announcement referenced voting records spanning a 22-year period (1996 to 2018).
3) Persons who were non-citizens at the time they obtained driver’s licenses or ID cards may have since become naturalized citizens, but they are not required to go back to DPS and change their status,
making their voter registration records subject to being inaccurately flagged for review.
So a LEGAL Green Card holder gets a driver's licence. Becomes a citizen. Votes.
In the time frame stated, over 12 million people became American Citizens through naturalization.
The Weak match parts means they are acknowledging that data may not be accurate.
They also RETRACTED a large part of their claim:
Indeed, with a few days, the Texas Tribune reported, the Texas secretary of state’s office was informing counties that “some of those voters” — a “substantial number” in some cases — didn’t belong on the lists it sent out:
The secretary of state’s office incorrectly included some voters who had submitted their voting registration applications at Texas Department of Public Safety offices, according to county officials. Now, the secretary of state is instructing counties to remove them from the list of flagged voters.
“We’re going to proceed very carefully,” said Douglas Ray, a special assistant county attorney in Harris County, where 29,822 voters were initially flagged by the state. A “substantial number” of them are now being marked as citizens, Ray said.