I'm going through the Build a Community with Knowledge and Chat module on trailhead and keep getting the same CSP violation when I try to whitelist the snap-in chat in the community builder. I have made sure my security settings allow whitelisted third party scripts, but I get the CSP violation whenever I try to whitelist the snap-in chat. I've also tried adding it to trusted sites and still get the same violation. Is there anything else I should be doing?
I had the same issue. Instead of trying to add the entire URL under whitelisted sites, Please try adding only until salesforceliveagent.com. Found the answer here. stackexchange
It solved my issue.