Hello David,
When installed and activated the plugin using php7, it doesnt work for me. I have to downgrade to 5.6, then it start working, after that I ugrade again php.
For example in domain-sharding.php line 333 there is:
function check_domain_sharding(&$buffer)
{
if ( $buffer != '' )
I think for make it work under php7 you have to delete ‘&’. At least I had to do it with some files of W3 Total caché plugin to make it work.
Maybe there are other issues but I am not quite advanced on programming on php. another thing, the verify button is not working for me too. Finally I used W3 total cache for sharding.
Kind Regards !