Joomla\CMS\HTML\HTMLHelper Select not found.

rbvvan

We have a site running Virtuemart 4.2.12, JA Mixstore template 2.0.3 and JA Mega Filter 2.0.4. After upgrading from Joomla 4 to Joomla 5.1 we get the following error when clicking on the shopping cart:
Joomla\CMS\HTML\HTMLHelper Select not found.

Further, I note there is a newer version of the template available to download, v2.1.1 however when trying to install it we get the message "Error Installing Template" and "JA Mixstore requires T3 plugin to be installed and enabled", but T3 system plugin v2.1.1 is already installed and enabled.

The Joomla extensions Updates shows no updates available for the template.

The site is on a local server so if you need to see it we would need to schedule a remote access session.

saguaros

rbvvan Hi

I can't replicate this issue at my end, you can take a backup of your site with Akeeba backup and share me the backup file. I will check in my local and see how it goes.

rbvvan

The user information is sensitive so I can't send you a backup. Can we schedule a time for a shared remote access?

saguaros

rbvvan Hi

Firstly, you can backup your site and install latest version for template and T3 plugin first.

Then go to Global Configuration >> enable Debug mode and set 'Error Reporting' to Maximum.

And rename this file: ROOT/templates/ja_mixstore/error.php

Then refresh the error page on frontend again, it will show the errors in details and you can share it here.