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Error trying to upgrade plugins

Started by nineplanets, October 16, 2021, 00:06:54 AM

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I'm taking over maintenance on a site using Joomla with VirtueMart, which hasn't been kept up to date, and I'm trying to get things updated to start off with.  I was able to get Joomla and the VirtueMart core updated, but if I try to update any of the VirtueMart plugins via Joomla's updater, I get "invalid extension update" and if I try to upload the AIO plugin zip via the installer, I get "Class 'vDispatcher' not found" instead.  I tried some googling of the errors, but didn't have any luck.  Anyone have any idea what the problem might be based on those errors?  I'm on Joomla 3.10.2 if that makes a difference.


The VM default plugins are installed/updated when the aio (All In One) package for the VirtueMart component is installed. If you check the list of packages on  you can see the aio package listed under the related VM main component. Use Joomla's Install facility to upload each package (I find this more reliable than the updater)

Lowestoft, Suffolk, UK

Retired from forum life November 2023

Please mention your VirtueMart, Joomla and PHP versions when asking a question in this forum


Trying to use the installer to upload the AIO package is what gives me the "Class 'vDispatcher' not found" error.

GJC Web Design

If your VM is very old you may have to upgrade the AIO step by step with each major release
GJC Web Design
VirtueMart and Joomla Developers - php developers
VM4 AusPost Shipping Plugin - e-go Shipping Plugin - VM4 Postcode Shipping Plugin - Radius Shipping Plugin - VM4 NZ Post Shipping Plugin - AusPost Estimator
Samport Payment Plugin - EcomMerchant Payment Plugin - ccBill payment Plugin
VM2 Product Lock Extension - VM2 Preconfig Adresses Extension - TaxCloud USA Taxes Plugin - Virtuemart  Product Review Component
Contact for any VirtueMart or Joomla development & customisation


Thanks!  Installing the AIO from each major release did the trick.