hello, after having done a Joomla 3 to 4 migration I have a message: 0 Call to undefined method Joomla\CMS\Application\AdministratorApplication::isAdmin() , and I no longer have access to my admin interface. Help me please
Staff replied
General
joomla migration error
2 replies
Rashida Rahman Staff
Hi there!
Thanks for reaching out.
Did you follow this while migrating your site, please?
https://www.joomshaper.com/blog/how-to-update-your-site-to-joomla-4
Which template are you using there?
More info about the error is here: https://forum.joomla.org/viewtopic.php?t=988008
And the following video guide may help too: https://youtu.be/ZO9nmdsLlFw?t=22
Best Regards
Paul Frankowski Senior Staff
Hi,
in general Joomla migration/upgrade is beyond JoomShaper support.
But to see what caused that problem edit your configuration.php file and set those:
Then check /administrator again.
Probably old plugin or module caused that problem. When you will know which one, just rename its folder name!
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