Surely, you will encounter an error that is displayed while entering the Strike Team screen. The displayed message says that you cannot open the Strike Team feature because you're not connected online. As you might guess, it complicates things significantly since Strike Teams let you easily gain quite valuable rewards and not being able to access this mechanic means no rewards.
The solution to this problem is very simple but requires patience - you need to go back to the main menu (where you can load the last saved game) and wait for a bit before you reenter the game. When you're in the main menu, you can see your username and server connection status above the navigation buttons. If you start playing too soon, the game doesn't have the time to connect online, which then results in the error described in the previous paragraph. To prevent it, wait in the main menu until the game confirms establishing server connection which is indicated by a green "light" next to "STATUS". Then, you can enter the game and enjoy your Strike Team access.
Not every player, let alone platform, is affected by this error. However, it's a good idea to take it into account and simply wait a dozen seconds. It could save us trouble.