1. StormWebDesign
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  3. Thursday, 03 April 2025
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We are currently working on a major migration from Joomla 3.4.8 over to Joomla 5 - we are using RO CSVI as part of this migration. But when trying to install RO CSVI 8.16.0 into the Joomla 3 website, I'm getting an error:

Fatal error: Class 'Joomla\CMS\Installer\InstallerScript' not found in /public_html/tmp/install_67ee6d554e6a5/script.php on line 28

Any ideas please?
Accepted Answer Pending Moderation
Hi,

The reason you get this error is because your Joomla installation is too old. RO CSVI 8.16.0 requires Joomla 3.10 or higher. There are two options you can choose from:

  1. Update the site to Joomla 3.10
  2. Install RO CSVI 7.15.0
The version 7.15.0 is from March 2020, that is before we changed the installer to use the Joomla InstallerScript. However there is 5 years of development difference between 7.15.0 and 8.16.0 so do not expect everything to work the same way if you choose option number 2. For example that verson does not have the migration templates that come with version 8.16.0.

Let me know if you have any further questions.
Kind regards,

RolandD

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