Georgia's Secretary of State fixed problems with the state's on-line voter lookup database even while publicly denying their existence. Brian Kemp, who is running for governor, even had the nerve to blame Democrats for the problem after they helped discover it. The security flaw could have exposed private information, such as partial social security and driver's license numbers. There is no indication that the flaw was utilized or blocked anyone from voting.
These problems were not with the actual voting machines in use on election day, although these have their own problems. Georgia remains one of the states that use touchscreen voting equipment that does not produce a paper ballot that can be verified as correct by the voter and used for audits and recounts.