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Error 500 after Updating from Joomla 3 to Joomla 4

Paolo G's Avatar Paolo G
Hi,

I am reaching out to you due to an issue I have encountered after upgrading from Joomla 3 to Joomla 4 on a test site. Before executing the upgrade, I disabled the plugins for my Regular Labs extensions. The upgrade seemed successful at first.

However, when I tried to reinstall the ReReplacer, I encountered a few errors:





Despite these errors, I continued with reinstalling the Cache cleaner, and that's when a major problem arose. Now, I'm dealing with an Error 500, which is affecting the entire backend of the site.

How can I fix, please?

Many thanks and regards
Peter van Westen's Avatar Peter van Westen ADMIN
Try deleting these folders:
/plugins/system/regularlabs
/libraries/regularlabs
(You will get other errors now).

Then uninstall the Regular Labs Library package.
And then reinstall the latest versions of the extensions you have installed.
Please post a rating at the Joomla! Extensions Directory
Paolo G's Avatar Paolo G
Many thanks Peter,

following your steps I was able to restore the backend and complete the last steps.

If I encounter the same problem on other sites I need to update, now I know how to fix it.

Best regards
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