<p>Note that the error message reported at <a class="issue-link js-issue-link" data-error-text="Failed to load issue title" data-id="271288459" data-permission-text="Issue title is private" data-url="https://github.com/hotosm/tasking-manager/issues/927" data-hovercard-type="issue" data-hovercard-url="/hotosm/tasking-manager/issues/927/hovercard?comment_id=557806742&comment_type=issue_comment" href="https://github.com/hotosm/tasking-manager/issues/927#issuecomment-557806742">hotosm/tasking-manager#927 (comment)</a> is different to what you have quoted here, namely:</p>
<blockquote>
<p>[blocked] The page at about:blank was not allowed to display insecure content from <a href="http://127.0.0.1:8111/load_and_zoom?left=-70.6644307209015&top=41.95700512499653&right=-70.65615190734864&bottom=41.95621870428267" rel="nofollow">http://127.0.0.1:8111/load_and_zoom?left=-70.6644307209015&top=41.95700512499653&right=-70.65615190734864&bottom=41.95621870428267</a>.</p>
</blockquote>
<p>That message is refusing to do an http load from an https page which is also a bug/limitation in Safari - other browsers specifically exempt 127.0.0.1 from that restriction.</p>

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