... to publish articles from a Master site to several Slave sites, I'm using Tags to sort which articles are publish on each one.
My problem now is finding a good Related Articles Module which can show the Related articles by keywords but where I can limit the result by a specific tag (or several ...

Will do. I was hoping to find a user who had an easy answer rather than swamping support.

Hello,
I had the manual in the past, but after changing computers I can't find it anymore.
Could you send it to me?
Thanks

nonetheless you should find a solution for customers of the E.U.

⋅ Feature: new advanced setting 'User Match Method' helps to choose how to auto-find phpBB poster from Joomla user, either by username or email.
⋅ Changes: Joomla 3.9.15, PHP 7.0 and phpBB 3.2 as minimum.
⋅ Feature: new setting "Comments Order".


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Where can I find any screenshots for p8pBB bridge?
Does it require me to have a regular phpBB on my site and "p8pBB bridge" is just a "bridge" between phpBB and Joomla?

Regarding SEO and subdomains, I tried to find a Joomla component to generate XML sitemaps for a domain and associated subdomains. I could not find one but did find a company with a script that could be run as a cron job to generate a single sitemap for both the domain and any number of subdomains ...

⋅ Feature: auto-find of tags menu item for tags.
⋅ Feature: new setting 'Shorten All URLs' allows to remove all parent aliases for all menu items.
⋅ Fix: category links from 'List All Categories' menu item.
⋅ Fix: Joomla 3.7 compatibility.


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... using their CB profiles. I want registration and login to happen ONLY using CB. I don't want people to do that through phpBB.

If "simple" is my goal is that anything that "regular" has that would be really important? If I find that I actually need something in "regular" can I upgrade for $10?

... I get this alert: "Updater: : Extension: Could not open"
And this error msg: "Update invalid" and
"Manual update is required", and that I could find more in the Customer area--supposedly at Alterbrains. But there is no info, as far as I can see.

Strangely, I cannot find any description of how to ...