Thanks Patrice, I've actually been checking my PHP error logs via cPanel. I have made some progress, and it appears Cloudflare could be the issue, both Cloudflare linked sites display the unidentified error message, however I can connect WebAssist MySQLi successfully to a third domain which is not linked to Cloudflare, although all the forums on Cloudflare state it cannot be a Cloudflare issue (something to do with proxied DNS) - It appears too coincidental. I am awaiting one of the two domains to propogate back to the origin server before further testing, just pausing Cloudflare didn't appear to have any affect.
