Cheers @steemitbc
I had been ignoring the PHP version running on my Namecheap hosted server which is serving a number of sites. Thank you for pointing it out.
I'm pretty sure that I have experienced issues with a few other WP plugins over the years and hadn't considered that the PHP version may have been at fault.
Now I know, it's time to upgrade all the other websites, hosted there too.
Thank you again.