Tabs not working for first time ever

This might be a slightly patronising question, but can you confirm that the plugin is definitely installed and activated?

Not patronizing in the least. The first question I always ask is “Is it plugged in?” This morning, I actually did a fresh install just to see.

View post on imgur.com

I just realised that jQuery UI plugin is also not showing up in the head. I’ve clearly overlooked something.

So, just re-reading that and poking at your website… You’re saying that you have two installs:

Live is running with the following URLs:
WP: https://glneurotech.com/bioradio
Site: https://glneurotech.com/bioradio

Labs is running with the following URLs:
WP: https://labs.glneurotech.com
Site: https://glneurotech.com

Would I be right in thinking that they’re both installed under the same root directory? I can see both labs.glneurotech.com and glneurotech.com are both on the same IP, is…

Live installed in the <document root>/bioradio directory?
Labs installed in the <document root>/ directory?

Or are they actually installed under their own unique root directories?

They’re two different installs:

Live is in https://glneurotech.com/bioradio
Labs is a subdomain at https://labs.glneurotech.com

Digging around on my web server, I noticed I’ve got a WP install at the root level (https://glneurotech.com) but I don’t recall how it got there. When I try to access it via https://glneurotech.com/wp-admin, I get re-routed to labs.glneurotech.com.

I’d kill it, but I don’t like doing those sorts of things during business hours ??

I don’t understand how you’re getting from

https://glneurotech.com/development/

to

https://labs.glneurotech.com

…but I suspect that the issue will be to do with this mechanism. If you have two installs of WordPress fighting over the same wp-content directory then you do get some odd things happening, such as plugins not loading.

Well, technically the URL is https://labs.glneurotech.com/development, but since the Site URL, as defined from within the WordPress UI, is https://glneurotech.com, the visitor sees only https://glneurotech.com/development/.

And I suspect you’re right about the competing installs. I’ll take another stab at this over the weekend and see what I accomplish. Thanks for taking the time to help illuminate a clearly non-plugin-related issue.

I think that your subdomain cannot be configured correctly, because

https://labs.glneurotech.com/development
and
https://glneurotech.com/development

both appear to return the same page. When someone goes to

https://labs.glneurotech.com/development

your server should serve up (for example) the site in

/var/www/vhosts/labs.glneurotech.com/htdocs/development

And when someone goes to

https://glneurotech.com/development

it should serve up the site in

/var/www/vhosts/glneurotech.com/htdocs/development

This second directory should not (presumably) exist, and so the site at

/var/www/vhosts/glneurotech.com/htdocs

Should serve up an appropriate 404.

I’m quite sure the trouble is in how the pages are served. My only uncertainty is why this is happening now, with these two plugins (jQuery UI seeming to have the same issue). This site has been live for a year now.

Still, looks like I’ve got a lot of work to do this weekend.

Thanks for your contribution, Matt.

/Amelia