We’re working to fix this soon. As @griffin mentioned, renewing at any other time should work well.
@Elmi77 Could you please let us know what OS you’re running, and how your ACME client was installed? I’d like to reach out to the developer/integrator and make sure that they randomize the time for future users, so that our traffic at the top of the hour isn’t so much higher than other times.
Thanks!