Finding and fixing some errors in the site

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504: Gateway Timeout
The code indicates that the site has timed out waiting for a response from the server. Typically, this takes 300 seconds.

The most common reason is that the execution of site scripts takes a very long time, for example, when unloading databases. To overcome this obstacle, you can access the site directly, via port 8081 (if the resource is running on the ISPmanager control panel) or 8080 (for cPanel and Plesk). You can set up the timeout intervals manually on the VPS.

First of all, when you hear the words "website diabetes mailing list errors", you imagine problems with the visual image of the pages: the layout and placement of images do not correspond to the webmaster's idea, the resource looks unusual in the mobile application due to the lack of adaptation, and some browsers do not display all the design elements. But this is not the end of the problems.

1. Visual problems of the site
Visual problems of the site

The vast majority of users have Chrome installed, including the Opera browser running on its engine. Therefore, first of all, you need to make sure that the site is displayed correctly in Chrome. Browser Shots will help eliminate visual problems in other browsers.

The popularity of mobile devices is constantly growing, smartphones are increasingly used to view resources, so the presence of any shortcomings will lead to the loss of a significant part of the audience. You can check how well the site is adapted to mobile devices using WebPageTest and Cross Browser Testing.

These tools, based on the results of the check, provide screenshots of pages where deviations from the webmaster’s intended design are immediately noticeable (the layout has gone wrong, the image has shifted, etc.).

There is another approach to bringing a site into proper shape - to ensure that the pages comply with the standards that are responsible for the visual component - HTML, CSS, WCAG.

True, if cross-browser layout is used, it will not be possible to bring the resource into compliance with CSS. But even the absence of discrepancies with the HTML and WCAG protocols guarantees trouble-free operation of the site, both from the technical side and from the point of view of convenience for users.

To check the resource for compliance with the HTML standard, the capabilities of the validator.w3.org service are used, and to make sure that the site does not contradict WCAG, you can use the AChecker service. Based on the results of the check, you will receive a list of technical errors, the correction of which will eliminate visual problems.