Unexpected Application Error!

Unable to preload CSS for /assets/index-JtPO44df.css

Error: Unable to preload CSS for /assets/index-JtPO44df.css
    at HTMLLinkElement.<anonymous> (https://www.theathletesfoot.co.nz/assets/index-7MWEoKZ8.js:2278:23322)
    at HTMLLinkElement.nrWrapper (https://www.theathletesfoot.co.nz/nike-air-zoom-structure-21-mens-vast-grey-bright-crimson-atmosphere-grey.html?srsltid=AfmBOoojnIfuWNTGyXXLCWwdK4zdxX2sX6g_-3wmpu4OHZKEkmxp0oth:1260:46)