Your version is out of date and some new icons are not working.
This is fixed on master and will be available in 1.11.1. Related gh issues, https://github.com/NodeBB/NodeBB/issues/7086 https://github.com/NodeBB/NodeBB/issues/7085
Thankfully, Pichalite was able to talk me up to 0.7.3, now we're trying to get up from there.
Interesting. Please check cloud GUI for domain configuration. Do you have all fields filled there?
Try to disable CloudFlare for test purposes.
Edit: happy to see it fixed