raise err.ProgrammingError("Cursor closed") pymysql.err.ProgrammingError: Cursor closed

[mupciamkotki]

raise err.ProgrammingError("Cursor closed") pymysql.err.ProgrammingError: Cursor closed
Not sure what's wrong

with cur as cursor:
pool.init()
sql = "INSERT INTO users (email, password) VALUES (%s, %s)"
cur.execute(sql, (email, password))
pool.release(connection)

      edit it was due to it being in with block, but now it works for a few threads and I still get packet sequence error