So I installed Squiz Matrix 4.18.2 without any errors following Nic's guide. However there are few minor bugs within the system that I have never came across.
1. PHP Notice appears when I search in the admin console
2. The list of available keywords custom form asset brings up the following message:
Not Found
The requested URL /__data/asset_types/form/popups/thank_you_keywords.php was not found on this server.
Regarding number 1, not sure what that could be. Would you be able to post what the actual PHP notice says and potentially the stack trace that comes with it if any?
Number 2 was fixed in 4.18.3, in this file packages/cms/form/form_email/form_email_edit_fns.inc on line 1918 the reference to where this popup lives has changed:
The issue may be something related to bug #6713 Array to string conversion error, which was closed as it couldn't be replicated. We will have another look at the issue soon.