Hello ladtaz,
Thanks for posting. I understand you're seeing an error about your Wi-Fi password when you try joining from your iPhone, and this resource may help you: If your iPhone, iPad, or iPod touch won’t connect to a Wi-Fi network
If asked, enter the password for your Wi-Fi network. Get help if you don’t know your password.
Even if you enter the correct password, you might see an "unable to join the network" message or an "incorrect password" message. Restart all of your devices, then try to enter your password again."
If restarting all devices as suggested above doesn't help, I recommend trying the additional steps in the link I posted above to see if they help. Feel free to reply back with an update if needed.
Take care.