I don't know, that's certainly pretty sus. Here's an article I found about it for a House seat, which Kemp oversaw but was not running in.

The server in question, which served as a statewide staging location for key election-related data, made national headlines in June after a security expert disclosed a gaping security hole that wasn't fixed six months after he reported it to election authorities.

...

The plaintiffs were counting on an independent security review of the Kennesaw server, which held electronic poll book data and ballot definitions for counties, to demonstrate the system's unreliability.

It looks like the lawsuit is finally being heard in court as of earlier this year.

I haven't read a ton about it, but it sounds like there are legitimate concerns (at least about the original system), but the issues are theoretical. I read it as a smear lawsuit intended to cast doubt on the election process, similar to what Trump did when he challenged the election.

I'm interested in seeing the outcome of the lawsuit, but I'm guessing there will be no evidence of vote tampering, just like with a Trump's suits. I hope evidence is still accessible but we won't know until the lawsuit concludes.