(1/1) RuntimeException Failed to start the session because headers have already been sent by "/homepages/34/d804356812/htdocs/clickandbuilds/PrestaShop/MyeCommerce/src/Adapter/EntityMapper.php" at line 99.

[Vincent Rose]

Site is down, cant get into back office or the main shop.

Worked on Wednesday but down today

[musicmaster]

Headers already sent means that some error message was generated before the point where the program would send http headers.

So rightclick the page in your browser and select "source code". You should see what has been sent.

[Vincent Rose]

Thank you, i really dont understand source , so looks like i will have to start again with a new shop

[musicmaster]

5 minutes ago, Vincent Rose said:

Thank you, i really dont understand source , so looks like i will have to start again with a new shop

The alternatives are showing the url or hiring someone...

[Mian Waqas]

On 6/6/2021 at 4:51 PM, Vincent Rose said:

Site is down, cant get into back office or the main shop.

Worked on Wednesday but down today

Hi,

This error is occurring because your template or one of your module are not compatible with PHP 7.4 , please try to downgrade the php version as per your prestashop version. try with 7.2 , 7.0 or 5.6 it will get fix.

also a work around is you can disable the debug mode and the error wont show up.

 

thanks

[Sue]

Shop is running but I can't reach backend...getting white page. Get this message on debug mode: 

RuntimeException

Failed to start the session because headers have already been sent by "/usr/www/users/......wxzkc/src/Adapter/EntityMapper.php" at line 99.

Any idea?????

Edited April 18, 2022 by Sue (see edit history)