Invalid date showing in Right Sidebar Blocks component for "upcoming events" panel on Safari

[JammyDodger]

FWIW there’s another report of this in the plugin topic as well:

Discourse Calendar and Events

Hi all! I’ve installed the Right Sidebar Blocks plugin to display upcoming events in the right sidebar using the upcoming-events-list block. However, after creating an event, I keep getting an “Invalid date” error in the upcoming events list. [Capture d’écran 2025-06-17 à 12.14.30] Has anyone encountered this before? Any idea what I might be doing wrong? Thanks a lot in advance for your feedback and support!