Solved - I used advice to clear another implementation issue - delete the html library and reinstall the template.

All now working perfectly.

Cheers!

I did install the J4 version of Boutique and cleared the cache.

This is what the stack shows:
Call stack
# Function Location
1 () JROOT/templates/j51_boutique/html/mod_menu/default.php:33
2 require() JROOT/modules/mod_menu/mod_menu.php:30
3 include() JROOT/libraries/src/Dispatcher/ModuleDispatcher.php:52
4 Joomla\CMS\Dispatcher\ModuleDispatcher::Joomla\CMS\Dispatcher\{closure}() JROOT/libraries/src/Dispatcher/ModuleDispatcher.php:55
5 Joomla\CMS\Dispatcher\ModuleDispatcher->dispatch() JROOT/libraries/src/Helper/ModuleHelper.php:281
6 Joomla\CMS\Helper\ModuleHelper::renderRawModule() JROOT/libraries/src/Helper/ModuleHelper.php:161
7 Joomla\CMS\Helper\ModuleHelper::renderModule() JROOT/libraries/src/Document/Renderer/Html/ModuleRenderer.php:99
8 Joomla\CMS\Document\Renderer\Html\ModuleRenderer->render() JROOT/templates/j51_boutique/php/variables.php:86
9 require_once() JROOT/templates/j51_boutique/index.php:38
10 require() JROOT/libraries/src/Document/HtmlDocument.php:741
11 Joomla\CMS\Document\HtmlDocument->_loadTemplate() JROOT/libraries/src/Document/HtmlDocument.php:796
12 Joomla\CMS\Document\HtmlDocument->_fetchTemplate() JROOT/libraries/src/Document/HtmlDocument.php:613
13 Joomla\CMS\Document\HtmlDocument->parse() JROOT/libraries/src/Application/CMSApplication.php:1012
14 Joomla\CMS\Application\CMSApplication->render() JROOT/libraries/src/Application/SiteApplication.php:724
15 Joomla\CMS\Application\SiteApplication->render() JROOT/libraries/src/Application/CMSApplication.php:298
16 Joomla\CMS\Application\CMSApplication->execute() JROOT/includes/app.php:61
17 require_once() JROOT/index.php:32

any luck installing the J4 version of Boutique?

Hi Ciaran,

The back end of the site is http://www.philiprgroom.com/administrator/index.php?phi
The Username is lip and password rgr
Super User is Nimda and BJ04ume1

I have paid for J4 Boutique, so I am hoping that when it is installed and turned on the existing configuration can become the default and Serenity can be turned of.

I have the exact same issue with another site, so plaease let me knwo what you do to fix it and I'll do the other one.

Many thanks!

Peter

Hello

This notice is common if you are using the Joomla 3 version of the template in a Joomla 4 installation. If this is not the case, may I suggest setting us up with temporary administration access to your Joomla installation and we will examine this issue further. For our reference please include a URL to this post in your email.

Ciaran

website is: https://www.philiprgroom.com/

Thanks