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-p5mUrsxB.js:623:6547)
    at HTMLLinkElement.nrWrapper (https://www.theathletesfoot.co.nz/asics-gel-kayano-27-womens-french-blue-digital-aqua.html?srsltid=AfmBOoq1RtmcQR4jQYvyhdLVi-RGkfz7b1vWdIGE3ocU-GdnznzPdsQO:1263:46)