When relationships change (adding new profiles, merging, etc.), it takes a while for the DNA indexing to catch up. WikiTree has to walk up and down all the connected profiles looking for DNA test takers.
On your WikiTree ID menu, select DNA, and then click on the DNA Tests tab, to verify you still have your tests showing.
Having your son on your Trusted List has nothing to do with the DNA indexing.
If you let us know the specific error message you are getting and what you were doing when it occurred, we can give you more specific assistance.