AttributeError: 'NoneType' object has no attribute 'find_next_sibling'

[danisuba10]

Describe the bug
When trying to download Emperor's Domination I get this error.

Desktop (please complete the following information):

• OS: [Windows 10]
• Firefox
• Version [97.0.1 (64-bit)]

Additional context
Exception in Tkinter callback
Traceback (most recent call last):
File "C:\Program Files\Python39\lib\tkinter_init_.py", line 1892, in call
return self.func(*args)
File "C:\Users\Dan\Desktop\Wuxiaworld-2-eBook-master\wuxiaworld2ebook.py", line 82, in button_press
getify.clean(str(s_chapter) + ".xhtml", get_xhtml_path(raw_info, s_chapter), name)
File "C:\Users\Dan\Desktop\Wuxiaworld-2-eBook-master\getify.py", line 42, in clean
content = chapter_title.find_next_sibling(class="fr-view")
AttributeError: 'NoneType' object has no attribute 'find_next_sibling'