[Closed] Vitus Nucleus dropping chain

Hi folks,

I got junior a Vitus Nucleus last autumn but only now he's been using it in earnest. Lately he's been dropping the chain quite a bit and have read this may be due to the chainring design on the Suntour Zeron crankset. I'm mulling over whether to fit a seattube chain guide or just swap out the chainring or chainset. Thing is I think the chainring isn't standard mount.

Any ideas on if the chain guide option would be ok or what chainset to go for as it would need to be boost and 10speed?