List index out of range error after updating to v9

I have recently updated erp v8 to v9

then i got error that there is tabwebhook not found but i fixed it using below thread

but after bench update i get this error on browser

IndexError
IndexError: list index out of range


traceback


File "/home/erpnext/daralatta/frappe-daral/apps/frappe/frappe/middlewares.py", line 15, in __call__
return super(StaticDataMiddleware, self).__call__(environ, start_response)
File "/home/erpnext/daralatta/frappe-daral/env/lib/python2.7/site-packages/werkzeug/wsgi.py", line 600, in __call__
return self.app(environ, start_response)
File "/home/erpnext/daralatta/frappe-daral/env/lib/python2.7/site-packages/werkzeug/wsgi.py", line 600, in __call__
return self.app(environ, start_response)
File "/home/erpnext/daralatta/frappe-daral/env/lib/python2.7/site-packages/werkzeug/local.py", line 228, in application
return ClosingIterator(app(environ, start_response), self.cleanup)
File "/home/erpnext/daralatta/frappe-daral/env/lib/python2.7/site-packages/werkzeug/wrappers.py", line 301, in application
return f(*args[:-2] + (request,))(*args[-2:])
File "/home/erpnext/daralatta/frappe-daral/apps/frappe/frappe/app.py", line 88, in application
response = handle_exception(e)
File "/home/erpnext/daralatta/frappe-daral/apps/frappe/frappe/app.py", line 191, in handle_exception
http_status_code=http_status_code)
File "/home/erpnext/daralatta/frappe-daral/apps/frappe/frappe/website/render.py", line 72, in render
data = render_page(path)
File "/home/erpnext/daralatta/frappe-daral/apps/frappe/frappe/website/render.py", line 149, in render_page
return build(path)
File "/home/erpnext/daralatta/frappe-daral/apps/frappe/frappe/website/render.py", line 156, in build
return build_page(path)
File "/home/erpnext/daralatta/frappe-daral/apps/frappe/frappe/website/render.py", line 169, in build_page
context = get_context(path)
File "/home/erpnext/daralatta/frappe-daral/apps/frappe/frappe/website/context.py", line 28, in get_context
context = build_context(context)
File "/home/erpnext/daralatta/frappe-daral/apps/frappe/frappe/website/context.py", line 77, in build_context
context.update(get_website_settings())
File "/home/erpnext/daralatta/frappe-daral/apps/frappe/frappe/website/doctype/website_settings/website_settings.py", line 117, in get_website_settings
add_website_theme(context)
File "/home/erpnext/daralatta/frappe-daral/apps/frappe/frappe/website/doctype/website_theme/website_theme.py", line 65, in add_website_theme
bootstrap = frappe.get_hooks("bootstrap")[0]

do anyone got error like this if so please help me to resolve .

when i try to doc reload in as in above thread i get this

In [4]: frappe.reload_doc('website', 'doctype', 'website_theme')
Out[4]: False

thanks in advance

i also have the same issue