odoo部署

再odoo界面安装其他外部模块的时候报错显示：

错误: Odoo Server Error Traceback (most recent call last): File "/home/odoo/odoo/odoo/http.py", line 624, in _handle_exception return super(JsonRequest, self)._handle_exception(exception) File "/home/odoo/odoo/odoo/http.py", line 310, in _handle_exception raise pycompat.reraise(type(exception), exception, sys.exc_info()[2]) File "/home/odoo/odoo/odoo/tools/pycompat.py", line 14, in reraise raise value File "/home/odoo/odoo/odoo/http.py", line 669, in dispatch result = self._call_function(**self.params) File "/home/odoo/odoo/odoo/http.py", line 350, in _call_function return checked_call(self.db, *args, **kwargs) File "/home/odoo/odoo/odoo/service/model.py", line 94, in wrapper return f(dbname, *args, **kwargs) File "/home/odoo/odoo/odoo/http.py", line 339, in checked_call result = self.endpoint(*a, **kw) File "/home/odoo/odoo/odoo/http.py", line 915, in __call__ return self.method(*args, **kw) File "/home/odoo/odoo/odoo/http.py", line 515, in response_wrap respOnse= f(*args, **kw) File "/home/odoo/odoo/addons/web/controllers/main.py", line 1343, in call_button action = self._call_kw(model, method, args, kwargs) File "/home/odoo/odoo/addons/web/controllers/main.py", line 1331, in _call_kw return call_kw(request.env[model], method, args, kwargs) File "/home/odoo/odoo/odoo/api.py", line 387, in call_kw result = _call_kw_multi(method, model, args, kwargs) File "/home/odoo/odoo/odoo/api.py", line 374, in _call_kw_multi result = method(recs, *args, **kwargs) File "<decorator-gen-59>", line 2, in button_immediate_install File "/home/odoo/odoo/odoo/addons/base/models/ir_module.py", line 72, in check_and_log return method(self, *args, **kwargs) File "/home/odoo/odoo/odoo/addons/base/models/ir_module.py", line 463, in button_immediate_install return self._button_immediate_function(type(self).button_install) File "/home/odoo/odoo/odoo/addons/base/models/ir_module.py", line 573, in _button_immediate_function modules.registry.Registry.new(self._cr.dbname, update_module=True) File "/home/odoo/odoo/odoo/modules/registry.py", line 86, in new odoo.modules.load_modules(registry._db, force_demo, status, update_module) File "/home/odoo/odoo/odoo/modules/loading.py", line 423, in load_modules loaded_modules, update_module, models_to_check) File "/home/odoo/odoo/odoo/modules/loading.py", line 315, in load_marked_modules perform_checks=perform_checks, models_to_check=models_to_check File "/home/odoo/odoo/odoo/modules/loading.py", line 182, in load_module_graph load_openerp_module(package.name) File "/home/odoo/odoo/odoo/modules/module.py", line 376, in load_openerp_module __import__('odoo.addons.' + module_name) File "/home/odoo/odoo/addons/pdc_radius/__init__.py", line 3, in <module> from . import controllers ImportError: cannot import name 'controllers' import controllers

请问是什么原因，需要怎么解决？？？