The "data:text/html,chromewebdata" URL value, referred to as kUnreachableWebDataURL in Chromium, is utilized when a URL fails to load within a frame, for instance, through RenderFrameImpl::didFailProvisionalLoad and LoadNavigationErrorPage. The issue being described appears to be a bug in Android WebView, based on Chromium, where it fails to load the specific web page due to an unmapped SSL error.

chromium browser

Chromium is an open-source project initiated by Google to offer the source code for the proprietary Google Chrome browser. The core of older versions of Android Open Source Project (AOSP) browser still relies on Chromium. The problem with Android Kit Kat WebView, built on Chromium, arises when it encounters an unmapped SSL error, leading to its inability to open certain web pages, particularly secure login pages presented by captive portals.

How to Solve?

This error is commonly associated with issues related to the browser's cache or corrupt browsing data. Solving this error involves various troubleshooting steps:

  1. Clear Browser Cache: One of the primary causes of this error is a corrupted browser cache. To resolve it, clear the cache by going to the browser's settings, find the "Clear browsing data" or "Clear cache" option, and select the appropriate time range to clear the cache.
  2. Disable Extensions: Browser extensions can sometimes interfere with web page loading. Temporarily disable all extensions and try accessing the page again. If the error disappears, one of the extensions might be the culprit. You can then enable them one by one to identify the problematic extension.
  3. Check Internet Connection: Ensure that your internet connection is stable and working correctly. A weak or intermittent connection can lead to loading issues.
  4. Disable Proxy Server: If you are using a proxy server, try disabling it temporarily to see if it resolves the error. Incorrect proxy settings can cause web page loading problems.
  5. Update Browser: Outdated browser versions might have bugs that can lead to errors. Make sure your browser is up to date with the latest version.
  6. Try Incognito/Private Mode: Open the web page in incognito or private mode, which disables extensions and might help identify if the issue is caused by an extension.
  7. Reset Browser Settings: If none of the above steps work, consider resetting your browser settings to their default values. This can resolve any configuration issues that might be causing the error.

Android Open Source Project (AOSP)

Android, developed by Google, follows a process where the latest changes and updates are kept internal until they are ready for release. Once ready, the source code is made available to the Android Open Source Project (AOSP). The Android Open Source Project (AOSP) is an initiative aimed at overseeing the development of the Android mobile platform, which encompasses the operating system (OS), middleware, and essential mobile applications.


Chromium is an open-source project that operates under the BSD license, encompassing a variety of third-party software licensed under different terms, ranging from public domain to specific one-off licenses. On the other hand, Google Chrome is a customized version of Chromium, distributed by Google. While Chrome shares the foundation of Chromium, it also incorporates additional software components licensed by Google, which are not available to the Chromium project.


The "Error: data:text/html,chromewebdata" typically occurs in web browsers like Google Chrome when a web page fails to load properly. It is often related to issues with the browser's cache or extensions. To resolve it, users can try clearing the browser cache, disabling extensions, and ensuring a stable internet connection. If the error persists, updating the browser or trying incognito mode may help identify the cause.