I'm not an expert but due to the fact the site is up and down with the weird error message with not familiar email address and the name johnie, I suspect it is under DDOS attack.
Sometimes only error with "Body".
It is not making any sense to perform unannounced maintenance which a schedule which brings the site up and down with those weird error messages.
Only time will tell.
Best case scenario, it is under maintenance.
Worst case scenario which is more logical to me, it is under attack.