@DudeThatsErin Hi!
There’s a whole “Guide” about login issues - I would recommend to have a look at that: [Guide] "I can't login" - Some tips for login problems/issues (as it is an iPhone, I would first look at that part about “smart punctuation” and “special characters”)
There also was a “bug” / workaround (?) the last months (on Apple devices), first visiting this Community Forum website, and then (or in another tab?) the web vault, making it possible to login suddenly, somehow. ?!