QoE is working in special licensing mode. It can be bought separatelly but there is basic pack (10+1) of sensors in any NPM/APM license. So even when you have QoE Eval expired (you can use unlimited number of sensors during Eval period) you can use these 10+1 thanks to NPM license.
Licensing errors in several files across Orion logs are known issue of NPM 11.5. Issue is currently not resolved but they are not involving any Orion module in any way, so you can ignore them entirely.