Lost Access to their Gmail account

So I have a block on certain things on my husband's phone with his permission but doing so it doesn't allow me to access his Gmail account anymore and I have to use it for many things including his medical stuff among other important things. How can I go about getting the phones ( I have a Pixel and he has a Motorola we have Google Fi) to let me put his account back on my phone? Everything I've tried so far just gives me the same response of you don't have permission/access etc parental control blah something lol I can't remember exactly what it says. I'm not completely illiterate when it comes to tech but I'm not having a great month and my brain is fried so I'm not thinking my best. Any help would be very appreciated. ☺️💜