The script is a command line script and based on your screenshot you are trying to run it in the browser.

I have just run the script at the command line and it runs without error and generates 86 pages.

Why do you expect there to be more pages

In summary. If there is no language string found then it is not included

The issue has three parts to it now...

Part 1: Abstract Method error in PHP stops the index being generated.

Command line failed for me too, giving the same error message as showed at the top of the browser screen shot.
Error: Class MediawikiCli contains 1 abstract method and must therefore be declared abstract or implement the remaining methods (Joomla\CMS\Application\CMSApplicationInterface::getName)

I've tested it via PHP 7.4.9 and 7.3.21 - both threw the error. PHP 5.6 doesn't throw the error, but also doesn't rebuild the toc.json file for me.

Part 2: What's the language string that is being looked at?

So from your note @brianteeman I've looked at the code closer and the TOC is created by:

• opening /administrator/language/en-GB/com_admin.ini
• looking for strings with "COM_ADMIN_HELP" as their prefix
• processing those strings into the TOC.

So I've manually done that to see what I could see.

86 of 89 current strings are included in the current Help TOC. These three did not make it into the TOC (or the TOC that I'm currently seeing via nightly builds).

COM_ADMIN_HELP_COMPONENTS_ACTIONLOGS="Action Logs"
COM_ADMIN_HELP_COMPONENTS_SEARCH="Search"
COM_ADMIN_HELP_SITE_MAINTENANCE_PURGE_EXPIRED_CACHE="Cache: Clear Expired Cache"

So based on what the script does, if it works as expected, then the TOC is generating correctly (except for these three items).

Part 3: Why should there be 235 items?

There should be 235 items (or a subset greater than 86), as that's how many help screens are available in JDOCs on different parts of Joomla 4. At a quick glance, Workflow and Mail Templates are two new Joomla 4 features missing from the TOC which then generated the issue.

The missing part therefore may not be an issue with the tool that generates the TOC, but instead requires a PR to add more COM_ADMIN_HELP strings into /administrator/language/en-GB/com_admin.ini in order to cover what's missing from https://docs.joomla.org/index.php?title=Category:Help_screen_4.0

Update

Part 1 is now resolved: To run the build/helpTOC.php command, additional dependencies are required. As a typical end user will not need to run this command, no further action is required at this time.

Part 2 will be revisited after the PR to fix Part 3 has been merged to check that the new strings are added to the TOC.

Part 3 hope to be resolved with an additional PR to add the missing language strings to the com_admin.ini.

Thanks for having me take a closer look @brianteeman and for the clarifying conversation in BFH @richard67 & @alikon

@ceford - Will be in discussion on Glip more as you're the most across the Help Screens creation process.

To run the build/helpTOC.php command, additional dependencies are required. As a typical end user will not need to run this command, no further action is required at this time

Actually the part about additional dependencies is probably not true. In fact what's more likely is that you're running a very dated version of the code - #29804

Although indeed to run build scripts you will need more than is in the standard nightlies.

Part 2 is just a fix to the language strings to point to the correct pages (e.g. the clear cache is trying to ping https://docs.joomla.org/Help4.x:Cache:_Clear_Expired_Cache based on that lang string you pasted but the page is actually at https://docs.joomla.org/Help4.x:Site_Maintenance_Purge_Expired_Cache)

Indeed part 3 is just create the language strings :)

This should be closed as the issue is resolved and @particthistle now knows what to do to add additional articles to the helpTOC

Closing due to reasons stated in previous comment. Feel free to re-open if you think this is wrong.

Please re-open as it would appear that no one has added the additional articles to the helpTOC

Please re-open as it would appear that no one has added the additional articles to the helpTOC

@brianteeman Do you know who can do that? Maybe @ceford ?

What is this list for? I have always assumed it to be the main topics. Even at 86 items it is quite long. At 235 it would be a very long scroll to Users. Also, I think individual plugins need individual links - at the moment they all share one link. That would be another 96+. Redesign or leave at 86?

Right now there are major gaps - such as mail templates

please test #43250