Error Showing while searching any field in anybox

Traceback (most recent call last):
File “/opt/bench/erpnext/apps/frappe/frappe/app.py”, line 55, in application
response = frappe.handler.handle()
File “/opt/bench/erpnext/apps/frappe/frappe/handler.py”, line 20, in handle
data = execute_cmd(cmd)
File “/opt/bench/erpnext/apps/frappe/frappe/handler.py”, line 55, in execute_cmd
return frappe.call(method, **frappe.form_dict)
File “/opt/bench/erpnext/apps/frappe/frappe/init.py”, line 1007, in call
return fn(*args, **newargs)
File “/opt/bench/erpnext/apps/frappe/frappe/utils/help.py”, line 26, in get_help
return HelpDatabase().search(text)
File “/opt/bench/erpnext/apps/frappe/frappe/utils/help.py”, line 81, in search
select title, intro, path from help where match(content) against (%s) limit 10’‘’, (‘%’+words+‘%’, words))
File “/opt/bench/erpnext/apps/frappe/frappe/database/database.py”, line 154, in sql
self._cursor.execute(query, values)
File “/opt/bench/erpnext/env/local/lib/python2.7/site-packages/pymysql/cursors.py”, line 170, in execute
result = self._query(query)
File “/opt/bench/erpnext/env/local/lib/python2.7/site-packages/pymysql/cursors.py”, line 328, in _query
conn.query(q)
File “/opt/bench/erpnext/env/local/lib/python2.7/site-packages/pymysql/connections.py”, line 516, in query
self._affected_rows = self._read_query_result(unbuffered=unbuffered)
File “/opt/bench/erpnext/env/local/lib/python2.7/site-packages/pymysql/connections.py”, line 727, in _read_query_result
result.read()
File “/opt/bench/erpnext/env/local/lib/python2.7/site-packages/pymysql/connections.py”, line 1066, in read
first_packet = self.connection._read_packet()
File “/opt/bench/erpnext/env/local/lib/python2.7/site-packages/pymysql/connections.py”, line 683, in _read_packet
packet.check_error()
File “/opt/bench/erpnext/env/local/lib/python2.7/site-packages/pymysql/protocol.py”, line 220, in check_error
err.raise_mysql_exception(self._data)
File “/opt/bench/erpnext/env/local/lib/python2.7/site-packages/pymysql/err.py”, line 109, in raise_mysql_exception
raise errorclass(errno, errval)