Title: W3 validation error Last modified: April 8, 2019 --- # W3 validation error * Resolved [andersnielsen1](https://wordpress.org/support/users/andersnielsen1/) * (@andersnielsen1) * [7 years, 2 months ago](https://wordpress.org/support/topic/w3-validation-error-5/) * Hi * After installing WP lyte ( great plugin BTW ) * I get some W3 validation errors in the code for the data URIs * _Error: Bad value for attribute src on element img: Expected a token character, whitespace, a semicolon, or a comma but saw = instead._ Viewing 15 replies - 1 through 15 (of 16 total) 1 [2](https://wordpress.org/support/topic/w3-validation-error-5/page/2/?output_format=md) [→](https://wordpress.org/support/topic/w3-validation-error-5/page/2/?output_format=md) * Plugin Author [Optimizing Matters](https://wordpress.org/support/users/optimizingmatters/) * (@optimizingmatters) * [7 years, 2 months ago](https://wordpress.org/support/topic/w3-validation-error-5/#post-11404621) * hmmm, [can’t reproduce on my blog](https://validator.w3.org/nu/?doc=https%3A%2F%2Fblog.futtta.be%2F2019%2F03%2F08%2Fmusic-from-our-tube-better-oblivion-community-center-performs-dylan-thomas%2F), so this might be configuration or it might be the result of some 3rd party plugin interfering? can you share a URL where this happens? * frank * Thread Starter [andersnielsen1](https://wordpress.org/support/users/andersnielsen1/) * (@andersnielsen1) * [7 years, 2 months ago](https://wordpress.org/support/topic/w3-validation-error-5/#post-11404684) * Sure: [https://goteam.dk/](https://goteam.dk/) * Plugin Author [Optimizing Matters](https://wordpress.org/support/users/optimizingmatters/) * (@optimizingmatters) * [7 years, 2 months ago](https://wordpress.org/support/topic/w3-validation-error-5/#post-11404964) * that’s the data-src as added (changed) by your lazy-load plugin [@andersnielsen1](https://wordpress.org/support/users/andersnielsen1/), which one are you using? * Thread Starter [andersnielsen1](https://wordpress.org/support/users/andersnielsen1/) * (@andersnielsen1) * [7 years, 2 months ago](https://wordpress.org/support/topic/w3-validation-error-5/#post-11405079) * none.. * I have: * ShortPixel Adaptive Images * ShortPixel Image Optimizer * Autoptimize * Installed, for best compatibility – I don’t know if theres an lazyload feature in one of them, but I think the plugins recommend each other. * Plugin Author [Optimizing Matters](https://wordpress.org/support/users/optimizingmatters/) * (@optimizingmatters) * [7 years, 2 months ago](https://wordpress.org/support/topic/w3-validation-error-5/#post-11405117) * likely shortpixel AI in that case 🙂 * Thread Starter [andersnielsen1](https://wordpress.org/support/users/andersnielsen1/) * (@andersnielsen1) * [7 years, 2 months ago](https://wordpress.org/support/topic/w3-validation-error-5/#post-11405119) * Ok, I write Shortpixel – thanks for your help * Plugin Author [Optimizing Matters](https://wordpress.org/support/users/optimizingmatters/) * (@optimizingmatters) * [7 years, 2 months ago](https://wordpress.org/support/topic/w3-validation-error-5/#post-11405226) * maybe first confirm by (briefly) disabling (if not done so already)? * Thread Starter [andersnielsen1](https://wordpress.org/support/users/andersnielsen1/) * (@andersnielsen1) * [7 years, 2 months ago](https://wordpress.org/support/topic/w3-validation-error-5/#post-11405229) * You where right… disabling the plugin – removed the errors * Plugin Author [Optimizing Matters](https://wordpress.org/support/users/optimizingmatters/) * (@optimizingmatters) * [7 years, 2 months ago](https://wordpress.org/support/topic/w3-validation-error-5/#post-11405333) * thanks for confirming, will close this here in that case. * feel free to [leave a review of the plugin and support here](https://wordpress.org/support/plugin/wp-youtube-lyte/reviews/#new-post)! 🙂 * Thread Starter [andersnielsen1](https://wordpress.org/support/users/andersnielsen1/) * (@andersnielsen1) * [7 years, 1 month ago](https://wordpress.org/support/topic/w3-validation-error-5/#post-11450508) * Hi Again * I found a validation error more, (reason for using the same tread) * Error: No space between attributes. * At line 35, column 11955 * =”Teambuilding”width=”560″ hei * If you search for “”””ing med GoTeam”width=”560″ hei”””” in the source code, of [https://goteam.dk](https://goteam.dk) * You can see the missing “whitespace” * Plugin Author [Optimizing Matters](https://wordpress.org/support/users/optimizingmatters/) * (@optimizingmatters) * [7 years, 1 month ago](https://wordpress.org/support/topic/w3-validation-error-5/#post-11450528) * that indeed is a missing space between the alt-tag value and the width, but; * I can’t reproduce on my own blog * [the code does have that space between the alt and the width](https://github.com/futtta/wp-youtube-lyte/blob/master/wp-youtube-lyte.php#L248), what’s more the alt-tag is left empty in the code * so it looks like something else (a plugin or custom code) is changing things on your site [@andersnielsen1](https://wordpress.org/support/users/andersnielsen1/)? * Thread Starter [andersnielsen1](https://wordpress.org/support/users/andersnielsen1/) * (@andersnielsen1) * [7 years, 1 month ago](https://wordpress.org/support/topic/w3-validation-error-5/#post-11450557) * Hmmm, I tried disabling my plugins.. Same error. * Do you have custom image uploaded to your video? (I have) * Plugin Author [Optimizing Matters](https://wordpress.org/support/users/optimizingmatters/) * (@optimizingmatters) * [7 years, 1 month ago](https://wordpress.org/support/topic/w3-validation-error-5/#post-11450577) * well, if you find out how/ where the alt-tag’s content is coming from, then you probably found the reason for the missing space 🙂 * Thread Starter [andersnielsen1](https://wordpress.org/support/users/andersnielsen1/) * (@andersnielsen1) * [7 years, 1 month ago](https://wordpress.org/support/topic/w3-validation-error-5/#post-11450590) * The alt text is the name of the page. * Don’t know why it’s inserted in the alt text – thought it was the lyte plugin which did that. * Plugin Author [Optimizing Matters](https://wordpress.org/support/users/optimizingmatters/) * (@optimizingmatters) * [7 years, 1 month ago](https://wordpress.org/support/topic/w3-validation-error-5/#post-11450606) * no, lyte does not fill the alt-tag for the img in the noscript 🙂 Viewing 15 replies - 1 through 15 (of 16 total) 1 [2](https://wordpress.org/support/topic/w3-validation-error-5/page/2/?output_format=md) [→](https://wordpress.org/support/topic/w3-validation-error-5/page/2/?output_format=md) The topic ‘W3 validation error’ is closed to new replies. * ![](https://ps.w.org/wp-youtube-lyte/assets/icon-128x128.png?rev=1836005) * [WP YouTube Lyte](https://wordpress.org/plugins/wp-youtube-lyte/) * [Frequently Asked Questions](https://wordpress.org/plugins/wp-youtube-lyte/#faq) * [Support Threads](https://wordpress.org/support/plugin/wp-youtube-lyte/) * [Active Topics](https://wordpress.org/support/plugin/wp-youtube-lyte/active/) * [Unresolved Topics](https://wordpress.org/support/plugin/wp-youtube-lyte/unresolved/) * [Reviews](https://wordpress.org/support/plugin/wp-youtube-lyte/reviews/) * 16 replies * 2 participants * Last reply from: [andersnielsen1](https://wordpress.org/support/users/andersnielsen1/) * Last activity: [7 years, 1 month ago](https://wordpress.org/support/topic/w3-validation-error-5/page/2/#post-11451107) * Status: resolved