reetp
2
You make no mention of your setup at all so makes diagnosis difficult.
Always read the release notes BEFORE you upgrade. Save yourself a lot of hassle and heartbreak.
I presume you are not running Mongo in docker? If you are you should be reading this.
If not then check the rocketlogs at startup, It should tell you which Mongo version it detects.
Have a read here and provide the informaton required.