Once you have replicated the issue, you can start fixing it. Depending on the nature and severity of the issue, different methods and tools may be necessary. For example, you can use tools like Screaming Frog, Broken Link Checker, or Ahrefs to find and fix broken links on your website. You can also use 301 redirects, custom 404 pages, or link reclamation to improve user experience and SEO. To measure and optimize loading speed, Google PageSpeed Insights, GTmetrix, or WebPageTest can be used. Caching, compression, minification, or content delivery networks (CDNs) are techniques to reduce page size and improve performance. Additionally, CSS Lint, HTML Validator, or W3C Markup Validation Service can be used to check and correct website code. Responsive design, media queries, or frameworks can also be used to ensure website adapts to different screen sizes and resolutions.