If you're going for MyCAREER or MyTEAM play and find you're getting the error 727e66ac, we have some great troubleshooting articles that may help you, as well as a tip that could get you right past that blocker!
First, the workaround is to just try swapping to another game mode. For example, if you're loading into MyCAREER give MyTEAM a try, or vice versa. This will often get you in, and then you can switch back.
In case that doesn't do the trick, we've got some articles that might guide you to a fix.
- [ [Consoles] General Networking Troubleshooting](https://support.2k.com/hc/articles/201335143)
- [ [PC] General Network Troubleshooting](https://support.2k.com/hc/articles/360003653033)
Finally, in case those aren't resolving your connection issue, your Internet Service Provider (ISP) is going to be your next best point of contact. They are the experts when it comes to your specific connections through their services.