im testing it on my local computer,but on install.php,it success to install.when i go to register/login page. it give an error A Database Error Occurred Unable to connect to your database server using ...

File "/home/indictrans/radhika_workspace/demoerp_v12/frappe-bench/env/lib/python3.5/site-packages/werkzeug/middleware/shared_data.py", line 220, in call return self ...