First try the apexchart-card on it’s own. My first guess is that you have apexchart-card not setup correctly (since I use numerous advanced nested cards inside swiper card withou issues).
Can you verify that the card does work outside of swipe-card? If you still get errors, see here for help -> ApexCharts card - A highly customizable graph card - Share your Projects! / Lovelace & Frontend - Home Assistant Community (home-assistant.io)