I don't know why there is "Statement expected, found Py:ELSE_KEYWORD" error

I'm tryiing to make contact list. There is error at bottom at this code and also try isn't work I'm don't know much about class. I want remove errors(that can cause by user) I want the shortest and easiest way without import module(but I would like to use bulit in module). I'm using pycharm and python 3.9.

help = '''1: help
2: add
3: delete
4: print book
5: modify
6: read file
7: print file
8: exit'''
line = '--------------------'


class Contact:
    book = {}

    def __init__(self):
        print(help)
        print(line)

    def add(self):
        try:
            print('add')
            name = input('input name')
            number = input('input number')
            self.book[name] = number
        except FileNotFoundError:
            print('Error: Unknown Error')

    def delete(self):
        try:
            print('delete')
            name = input('input name')
            del self.book[name]
        except:
            print('Error: KeyError or Unknown Error')

    def printbook(self):
        try:
            print('printbook')
            print('there is ' + str(len(self.book)) + ' people')
            for x in self.book:
                print('name: ' + x, end='')
                print('\tnumber: ' + self.book[x])
        except:
            print('Error: Unknown Error')

    def modify(self):
        try:
            print('modify')
            name = input('input name')
            new_name = input('input new name')
            number = input('input number')
            self.book[name] = number
            self.book[new_name] = self.book.pop(name)
        except:
            print('Error: KeyError or Unknown Error')

    def readfile(self):
        try:
            file_name = input('input file name to read') + '.txt'
            with open(file_name, "r") as file:
                book_list = file.readlines()
                for x in book_list:
                    x = x.split()
                    self.book[x[0]] = x[1]
            print('read ' + file)
        except:
            print('Error: FileError, FileContents or Unknown Error')

    def printfile(self):
        try:
            file_name = input('input file name to write') + '.txt'
            with open(file_name, "w") as file:
                key = list(self.book.keys())
                val = list(self.book.values())
                for x in range(len(self.book)):
                    file.write(key[x] + ' ' + val[x] + '\n')
            print('print at ' + file)
        except:
            print('Error: FileError or Unknown Error')


def program_help():
    try:
        print(help)
        detale = int(input('which one?'))
        if detale == 1:
            print('it gives you help')
        elif detale == 2:
            print('it makes you able to add person')
        elif detale == 3:
            print('it allows you delete person')
        elif detale == 4:
            print('it prints book so you can able to see')
        elif detale == 5:
            print('it allows you to edit name&number')
        elif detale == 6:
            print('it makes you able to add contact number in your file. You should not add \'.txt\'')
        elif detale == 7:
            print('it makes you able to print contact number to file. You should not add \'.txt\'')
        elif detale == 8:
            print('it finishes program')
        detale = input('need more detale? (y/n)')
        if detale == 'y':
            program_help()
    except:
        print('Error: Unknown Error')


b = Contact()
while True:
    answer = int(input('choose function'))
    if answer == 1:
        print(help)
        while detale != 'y' or 'Y' or 'n' or 'N':
            detale = input('need detale? (y/n)')
            if detale != 'y' or 'Y' or 'n' or 'N':
                print('Error: please type again')
        if detale == 'y':
            program_help()
    elif answer == 2:
        b.add()
    elif answer == 3:
        b.delete()
    elif answer == 4:
        b.printbook()
    elif answer == 5:
        b.modify()
    elif answer == 6:
        b.readfile()
    elif answer == 7:
        b.printfile()
    elif answer == 8:
        print('exit')
        quit()
    print(line)
    else:#error
        print('Error: User typed an unknown word')