Login error help

[phpmistery]

Hello! I started to have problems on my admin login page. I see 3 warnings and below that, my login (but is not working now).

Here´s what you see on https://www.bariloche.esp.br/administrator/login

https://fonts.googleapis.com

A PHP Error was encountered

Severity: Warning

Message: session_start(): Cannot send session cookie - headers already sent by (output started at /home/bariloch/public_html/administrator/index.php:2)

Filename: Session/Session.php

Line Number: 143

Backtrace:

File: /home/bariloch/public_html/administrator/application/controllers/Login.php
Line: 23
Function: __construct

File: /home/bariloch/public_html/administrator/index.php
Line: 317
Function: require_once

A PHP Error was encountered

Severity: Warning

Message: session_start(): Cannot send session cache limiter - headers already sent (output started at /home/bariloch/public_html/administrator/index.php:2)

Filename: Session/Session.php

Line Number: 143

Backtrace:

File: /home/bariloch/public_html/administrator/application/controllers/Login.php
Line: 23
Function: __construct

File: /home/bariloch/public_html/administrator/index.php
Line: 317
Function: require_once

A PHP Error was encountered

Severity: Warning

Message: Cannot modify header information - headers already sent by (output started at /home/bariloch/public_html/administrator/index.php:2)

Filename: helpers/url_helper.php

Line Number: 564

Backtrace:

File: /home/bariloch/public_html/administrator/application/views/login.php
Line: 17
Function: redirect

File: /home/bariloch/public_html/administrator/application/controllers/Login.php
Line: 30
Function: view

File: /home/bariloch/public_html/administrator/index.php
Line: 317
Function: require_once

[chorn]

That’s because you have any output before that, maybe just a whitespace or BOM, so you have to go through every file that is shown and fix that.