https://wccftech.com/resident-evil-restance-beta-delayed-pc-ps4/

Resident Evil Resistance, the standalone asymmetric multiplayer game that ships along with the upcoming Resident Evil 3 remake, had been forced to delay its open beta on PC and PS4. The beta kicked off at midnight PT on consoles and 10am PT on PC, but players quickly began complaining of matchmaking issues that made joining games nearly impossible. The official Resident Evil Twitter account acknowledged the issue and later announced the beta was being delayed for PC and PS4 – the Xbox One version is apparently unaffected by the issues.

We're aware that PS4 users trying to play the Resident Evil Resistance beta are experiencing matchmaking issues at this time, and are working on resolving the problem. Please stay tuned for further updates. We appreciate your patience!