confirmed

index.php:1 Mixed Content: The page at 'https://www.example.com/administrator/index.php?option=com_admin&view=help' was loaded over HTTPS, but requested an insecure resource 'http://help.joomla.org/proxy/index.php?option=com_help&keyref=Help51:Start_Here'. This request has been blocked; the content must be served over HTTPS.

was there a redirect to https in place on the help server previously that has been lost in the server migrations @carcam

And in case someone tests it in 5.2.0-beta, the links with Help52 don't yet exist.

@gwstyles, could you please check whether you can access this link: https://help.joomla.org/proxy?keyref=Help51:Start_Here&lang=en
And whether this matches the link in the source code when you access yourdomain.tld/administrator/index.php?option=com_admin&view=help. Thanks.

Can't replicate for 5.1, 5.2 may not have any entries yet.

This is the url I get; https://xxxx.com/administrator/index.php?option=com_admin&view=help
When hovering on a help file I get https://help.joomla.org/proxy?keyref=Help51:Admin_modules_Multilingual_Status&Lang=en

The problem is coming from Help:CreateUrl here

If you look at the generated code you will see that all the links are http EXCEPT for the licence

Weird that I can confirm the problem on one server but not on another

@gwstyles There is a missing colon in your URL after Modules:
Correct link: https://help.joomla.org/proxy?keyref=Help51:Admin_Modules:_Multilingual_Status&lang=en

Weird that I can confirm the problem on one server but not on another

can you check your configuration.php please?

public $helpurl = 'https://help.joomla.org/proxy?keyref=Help{major}{minor}:{keyref}&lang={langcode}';

No I have the colon, I just missed it, very hard to see the url. I am long in the tooth...

@HLeithner - bingo give that man a prize. That is indeed the problem

is this a new site or a page from an older joomla version? (at least the config file)

it is a site that has been upgraded from 3.x
other updated sites are ok - weird

problem resolved as "my error" as far as I am concerned

I have just discovered after watching Brian's video that turning Privacy badger Off for my site and Voila it all works.

@gwstyles please close the issue if your problem has now been resolved. Thank you.