Laravel livewire live search does not work on FreeBSD

I have an application developed in Laravel on a Vagrant box and deployed 
to a FreeBSD server. I have recently updated the application to use the 
Livewire datatables live search function.

Everything works as expected on the Vagrant box, but the live search 
does not work on the FreeBSD server. I have tried different versions of 
FreeBSD and Linux, and MySQL/MariaDB, and a number of demo live search 
applications, but the live search fails consistently on FreeBSD and 
works consistently on Linux.

Any ideas on how to activate this function on FreeBSD would be greatly 
appreciated.

Using Nginx 1.18.0/1.20.2, PHP 7.4, MySQL 5.7/8.0

Works on:
---------
Vagrant box:
Linux 5.4.0-88-generic #99-Ubuntu SMP Thu Sep 23 17:29:00 UTC 2021 
x86_64 x86_64 x86_64 GNU/Linux

Debian:
Linux 5.10.0-11-amd64 #1 SMP Debian 5.10.92-1 (2022-01-18) x86_64 
GNU/Linux

Fails on:
---------
FreeBSD:
FreeBSD 12.2-RELEASE-p7 FreeBSD 12.2-RELEASE-p7 GENERIC amd64
FreeBSD 13.0-RELEASE #0 releng/13.0-n244733-ea31abc261f
--
Rob