Error:
Odoo Server Error

Traceback (most recent call last):
  File "/data/build/odoo/odoo/http.py", line 627, in _handle_exception
    return super(JsonRequest, self)._handle_exception(exception)
  File "/data/build/odoo/odoo/http.py", line 317, in _handle_exception
    raise pycompat.reraise(type(exception), exception, sys.exc_info()[2])
  File "/data/build/odoo/odoo/tools/pycompat.py", line 14, in reraise
    raise value
  File "/data/build/odoo/odoo/http.py", line 672, in dispatch
    result = self._call_function(**self.params)
  File "/data/build/odoo/odoo/http.py", line 353, in _call_function
    return checked_call(self.db, *args, **kwargs)
  File "/data/build/odoo/odoo/service/model.py", line 93, in wrapper
    return f(dbname, *args, **kwargs)
  File "/data/build/odoo/odoo/http.py", line 346, in checked_call
    result = self.endpoint(*a, **kw)
  File "/data/build/odoo/odoo/http.py", line 917, in __call__
    return self.method(*args, **kw)
  File "/data/build/odoo/odoo/http.py", line 518, in response_wrap
    response = f(*args, **kw)
  File "/data/build/odoo/addons/web/controllers/main.py", line 1108, in call_kw
    return self._call_kw(model, method, args, kwargs)
  File "/data/build/odoo/addons/web/controllers/main.py", line 1100, in _call_kw
    return call_kw(request.env[model], method, args, kwargs)
  File "/data/build/odoo/odoo/api.py", line 400, in call_kw
    result = _call_kw_multi(method, model, args, kwargs)
  File "/data/build/odoo/odoo/api.py", line 387, in _call_kw_multi
    result = method(recs, *args, **kwargs)
  File "/data/build/odoo/odoo/models.py", line 5883, in onchange
    record._onchange_eval(name, field_onchange[name], result)
  File "/data/build/odoo/odoo/models.py", line 5684, in _onchange_eval
    method_res = method(self)
  File "/data/build/odoo/addons/phone_validation/models/res_partner.py", line 19, in _onchange_mobile_validation
    self.mobile = self.phone_format(self.mobile)
  File "/data/build/odoo/addons/phone_validation/models/phone_validation_mixin.py", line 26, in phone_format
    raise_exception=False
  File "/data/build/odoo/addons/phone_validation/tools/phone_validation.py", line 46, in phone_format
    phone_nbr = phone_parse(number, country_code)
  File "/data/build/odoo/addons/phone_validation/tools/phone_validation.py", line 18, in phone_parse
    phone_nbr = phonenumbers.parse(number, region=country_code, keep_raw_input=True)
  File "/usr/local/lib/python3.6/dist-packages/phonenumbers/phonenumberutil.py", line 2818, in parse
    metadata = PhoneMetadata.metadata_for_region(region.upper(), None)
AttributeError: 'bool' object has no attribute 'upper'