The best way to Setup WordPress Area Mapping from subfolder multisite subsite

I’ve a wordpress multisite put in in a subfolder like so

instance.com/wp/ (major website online) instance.com/wp/subsite1 instance.com/wp/subsite2 instance.com/wp/subsite3

I’ve attempted to map a site to one of the crucial subsites, however this doesn’t appear to paintings. I remember the fact that Earlier than WordPress 4.5, area mapping required a site mapping plugin like WordPress MU Area Mapping. Then again, In WordPress 4.5+, area mapping is a local function.

However it is not running within the above situation. Is that this a DNS factor for the reason that multisite set up is in a subfolder or what?

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