If you're unable to share editing permissions with others on your Google Site, several factors could be contributing to this issue. One common reason is the permission settings of the Google Site itself. Ensure that you have sufficient privileges to modify sharing settings. Typically, only the site owner or users with specific administrative rights can change these permissions. If you're not the site owner, you might need to request the owner to grant you the necessary permissions to share editing access with others.

Another possible reason is related to the type of Google account you're using. If your Google Site is part of a Google Workspace account (formerly G Suite), there might be organizational policies in place that restrict sharing settings. Administrators of Google Workspace accounts can configure sharing settings to limit who can be given access to edit sites, often to maintain security and control over the content. In such cases, you would need to contact your organization’s IT administrator to understand the restrictions and possibly request changes to the sharing policies.

Technical issues can also prevent you from sharing editing permissions. Browser-related problems, such as outdated software or incompatible extensions, can interfere with the functionality of Google Sites. Clearing your browser cache, updating your browser, or trying a different browser can sometimes resolve these issues. Additionally, ensuring a stable internet connection is crucial, as connectivity problems can hinder your ability to modify sharing settings.

Lastly, it’s important to check if there are any ongoing issues with Google Sites. Sometimes, temporary server issues or maintenance activities can affect the platform’s functionality. Visiting the Google Workspace Status Dashboard can help you determine if there are any known outages or problems with Google Sites. If all else fails, reaching out to Google Support for assistance can provide you with specific guidance and help resolve the issue.