Prestashop core file error

[mingxp]

Site: 

https://www.boho.kathmanduclothing.com/

Errors

Warning: Cannot modify header information - headers already sent by (output started at /home/dh_yq5k5r/boho.kathmanduclothing.com/index.php:1) in /home/dh_yq5k5r/boho.kathmanduclothing.com/classes/shop/Shop.php on line 444

Warning: Cannot modify header information - headers already sent by (output started at /home/dh_yq5k5r/boho.kathmanduclothing.com/index.php:1) in /home/dh_yq5k5r/boho.kathmanduclothing.com/classes/shop/Shop.php on line 445

Site information: 

PrestaShop version: 1.7.6.7

Current theme in use: alysum

Server information Linux #4 SMP Wed Aug 28 15:05:40 PDT 2019 x86_64

Server software version: Apache

PHP version: 7.1.33

Memory limit: 256M

Max execution time: 120

Upload Max File size: 512M

I tried following without any success removing the error
Change to Prestashop default theme
Cleared cache
Turn off the Prestashop debug mode

Please advice.

[musicmaster]

I note that the error page starts with two empty lines. The problem is that you are sending data before the http header is sent and that can be anything. It can be some error message. But it can also be just whitespace that you left at the wrong place.

[CedCommerce Team]

Hello,

Hope you are doing well.

This type of issue raised when theme is not installed properly or anything missing from the theme settings. 

Thanks!!!