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Akeeba Backup for Joomla!

#36819 Class 'Joomla\Plugin\System\BackupOnUpdate\Extension\BackupOnUpdate' not found

Posted in ‘Akeeba Backup for Joomla! 4 & 5’
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Environment Information

Joomla! version
n/a
PHP version
n/a
Akeeba Backup version
n/a

Latest post by paurat on Tuesday, 22 March 2022 06:53 CDT

Monday, 21 March 2022 19:38 CDT

paurat

Please look at the bottom of this page (under Support Policy Summary) for our support policy summary, containing important information regarding our working hours and our support policy. Thank you!


EXTREMELY IMPORTANT: Please attach a ZIP file containing your Akeeba Backup log file in order for us to help you with any backup or restoration issue. If the file is over 2Mb, please upload it on your server and post a link to it.


Description of my issue:

Installed Backup Pro to fresh install Joomla 4.1. Extension says it has installed correctly, but when trying to open Control Panel (or any other menu item) I receive:

Class 'Joomla\Plugin\System\BackupOnUpdate\Extension\BackupOnUpdate' not found

Tuesday, 22 March 2022 02:24 CDT

nicholas

Delete the file administrator/cache/autoload_psr4.php.

You should do that every time you get a Class Not Found error after installing or updating ANY extension. This file is supposed to be generated by Joomla every time you install or update an extension, it's Joomla's cache of where to find each extension's files. If it's out of date you will get Class Not Found errors on your site. If the file is missing it will be automatically regenerated in the next page load from the information in the XML files of installed extensions.

Nicholas K. Dionysopoulos

Lead Developer and Director

🇬🇷Greek: native 🇬🇧English: excellent 🇫🇷French: basic • 🕐 My time zone is Europe / Athens
Please keep in mind my timezone and cultural differences when reading my replies. Thank you!

Tuesday, 22 March 2022 06:53 CDT

paurat

Thank you. Worked perfectly.

Support Information

Working hours: We are open Monday to Friday, 9am to 7pm Cyprus timezone (EET / EEST). Support is provided by the same developers writing the software, all of which live in Europe. You can still file tickets outside of our working hours, but we cannot respond to them until we're back at the office.

Support policy: We would like to kindly inform you that when using our support you have already agreed to the Support Policy which is part of our Terms of Service. Thank you for your understanding and for helping us help you!