Nighthawk router is blocking SMS verification codes

[JillCee]

Just installed AX5400  (which doesn't appear in the menu above) and it is blocking every single verification code I receive - for work platforms, financial institutions. I cannot log into my account! I deactviated the Armor program and still can't get these messsages. How do I fix this? It is seriously jamming up my life. 

[DarrenM]

DId you ever resolve this issue? Do you have a modem router combo from your ISP?