The Variety article goes into more details.

https://variety.com/2023/biz/news/sag-aftra-vote-authorize-video-game-strike-1235735114/

SAG-AFTRA stated

“After five rounds of bargaining, it has become abundantly clear that the video game companies aren’t willing to meaningfully engage on the critical issues: compensation undercut by inflation, unregulated use of AI and safety,” said Duncan Crabtree-Ireland, SAG-AFTRA national executive director and chief negotiator, in a statement. “I remain hopeful that we will be able to reach an agreement that meets members’ needs, but our members are done being exploited, and if these corporations aren’t willing to offer a fair deal, our next stop will be the picket lines.”

The signatory companies stated

“We will continue to negotiate in good faith to reach an agreement that reflects the important contributions of SAG-AFTRA-represented performers in video games. We have reached tentative agreements on over half of the proposals and are optimistic we can find a resolution at the bargaining table.”