No worries this should help, I copied this is from the troubleshooting guide for the Revival Mod. There is also a program on the discord channel that will automatically do this for you so you don't have to do it everytime. Alternatively you could also go offline in origin before launching the game which is what I do since I play offline cfm anyway.
LIVE CONTENT DETECTED MESSAGE
Delete the Madden NFL 20 live content update folder. Can be located inside of Local Disk > ProgramData > Frostybite > MaddenNFL20 (If you aren’t seeing it, make hidden folders visible . If don’t know how google your OS on how to)
Link to discord:
https://discord.gg/SPwtbFD