call to undefined method - isAdmin

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Joomla! Fledgling
Joomla! Fledgling
Posts: 1
Joined: Wed Oct 13, 2021 5:30 am

call to undefined method - isAdmin

Post by mohammad82 » Wed Oct 13, 2021 6:05 am

Hello everyone
I have a Joomla 3.10 site (was upgraded from Joomla 3.9 without issues). After Upgrading to Joomla 3.10, updating all native and installed plugins to their latest versions, I downloaded and installed Joomla 4.0. Immediately after the upgrade, I got the Call to undefined method ... isAdmin(). After checking a few forum posts about the issue, I found some suggest that it's the template compatibility. The template I'm using is not developed for Joomla 4.0 (but it was working fine with Joomla 3.10), so I disabled and uninstalled the template AND disabled all plugins that come with it, mainly K2 plugins. Yet, I'm still facing the same issue when I try to upgrade to J! 4.0.

I have read in one of the posts that Joomla 4.0.0 had an issue, so I tried Joomla 4.0.3 but still no luck. After I get the error the administration side and front side become unfunctional.

I am doing all these tests on a test server so my live site is running smoothly.

I hope you have an idea of how to resolve this issue.

My server specs:
OS: Ubuntu 18.04.5 LTS
PHP: 7.3 (but even with 7.4 I had the same issue)

Please check the attachments

Thank you.
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Joomla! Master
Joomla! Master
Posts: 10904
Joined: Sun Jul 05, 2009 3:30 am
Location: Canberra, Australia

Re: call to undefined method - isAdmin

Post by sozzled » Wed Oct 13, 2021 6:14 am

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

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