The primary reason why the Google Blogger comment function fails to work or throws errors like "Failed to publish comment. Please try again later." is due to how modern web browsers handle third-party tracking and cookies.
Because Blogger's comment infrastructure is an outdated architecture, the system loads the comment section from the blogger.com domain inside an iframe, while your actual blog runs on blogspot.com or a custom domain. Modern browser privacy settings interpret this cross-domain loading as a malicious tracking attempt and block it entirely. [1, 2]
Core Issues Explaining the Failure
Third-Party Cookie Blocking: Browsers like Google Chrome, Apple Safari, and Mozilla Firefox now strictly restrict third-party cookies by default. Because the blog domain and the blogger.com validation domain are different, the browser blocks the connection, stopping the system from recognizing that you or your readers are logged into a Google account.
Enhanced Tracking Protection: Security extensions (like Privacy Badger) or integrated browser protections (like Firefox's Enhanced Tracking Protection) mistake the comment iframe for an invisible tracker and silently suppress it.
Corrupted Dashboard Widgets: If you can see the comment section internally but it fails to load on live pages, the template's HTML rendering engine or "Post Page" widget might be broken.
How to Fix the Comment Function
For Blog Readers & Commenters
If you are trying to leave a comment on someone else's blog, use these steps to bypass browser blocks:
Disable Tracking Protection: Click the shield icon in your browser address bar (on Firefox or Chrome) and turn off "Enhanced Tracking Protection" or "Block Third-Party Cookies" for that specific website.
Turn off Cross-Site Tracking (Safari/iOS): If using Safari on Mac or iPad, go to Settings > Privacy and toggle off Prevent Cross-Site Tracking.
Use Incognito/Private Mode: Open the blog post in an Incognito window to check if a specific extension is interfering with the scripts.
For Blog Owners
If you host a blog on Blogger and your readers cannot comment, try these backend adjustments:
Change the Comment Location:Go to your Blogger Dashboard.
Select Settings > scroll down to Comments.
Change the Comment location from Embedded to Full page or Popup. This forces the page to reload the comment structure outside of the broken iframe system.
Verify Layout Permissions: Go to Layout > edit the Blog Posts gadget > make sure Show comments with count is turned on. Disabling this accidentally hides the comment window globally.
Reset HTML Templates: If using a custom theme, your HTML widgets might be outdated. Navigate to Theme > Edit HTML and choose to Revert widget templates to default to restore native scripts.
OK - I tried some of that and it has made no difference.
I equate this problem to my gout condition. The medical providers have been bloody unhelpful so I'm just waiting until the condition comes right by itself without drugs - maybe a week or so.
I guess Aunty Google might get this sorted so I'll wait it out. What's the downside anyway? No Robert's posts? I think I'll be able to manage.

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