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//shop/womens/new-balance?p=8&srsltid=AfmBOoqka2NYv_FVtd13yQMNpi35uie6vqaT4txxG2KvmFfj79LQ4a5Q:1260:46)