Joomla 3.9 to 4.1 disaster: admin frozen Topic is solved

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russbo
Joomla! Apprentice
Joomla! Apprentice
Posts: 16
Joined: Sun Aug 05, 2007 3:11 am

Joomla 3.9 to 4.1 disaster: admin frozen

Post by russbo » Fri May 20, 2022 2:30 am

Upgraded to latest Joomla, installed a plugin to try to get the site working correctly, crashed admin area:
Call to undefined method Joomla\CMS\Application\AdministratorApplication::isAdmin()

Problem is, Joomla admin area is completely locked; I'm in it, but can't navigate anywhere, just frozen. Can't do a thing. Before I wipe everything and restore a backup, is there any way to get around this, to uninstall the faulty plugin? Not sure what it is. Also, I see now that previous templates are a bozo no no.

www.russbo.com

Thanks guys!

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sozzled
Joomla! Master
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Posts: 12017
Joined: Sun Jul 05, 2009 3:30 am
Location: Canberra, Australia

Re: J! 4.x isAdmin() in system plugin

Post by sozzled » Fri May 20, 2022 3:01 am

“If you think I’m wrong then say, ‘I think you’re wrong.’ If you say ‘You’re wrong!’, how do you know?” :)

russbo
Joomla! Apprentice
Joomla! Apprentice
Posts: 16
Joined: Sun Aug 05, 2007 3:11 am

Re: Joomla 3.9 to 4.1 disaster: admin frozen

Post by russbo » Fri May 20, 2022 3:35 am

I'm back into the admin area.

FTP into site, renamed the possible plugin subfolders that may have held the offending plug in (plugin to pluginbak).

Got back into admin area. In FTP, then renamed all plugin subfolders to original names so I could disable them.

Disabled all non joomla project components, modules, themes and plugins

Have a working site, front and back end. Going to be some work getting it back to the way it was...

As usual, appreciate the fact that there are people out there to help.


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