White page after paypal payment - payment not completed

[vallka]

Please help. My webshop keeps on showing white screen after Paypal payment. Payment not completed. It happens randomly, but often. Sometimes I see blank pages in other places, but much less frequently. The Paypal problem is most annoying,

Prestashop version - 1.6.1.4. PayPal v3.10.10 - by PrestaShop

Hoster - 1and1.co.uk, Unlimited plan. PHP Version 5.6.24

 

I'm using the copy of standard theme, only changes a few styles in it, did not make any functional changes

 

I have tried various options of caching on Performance page - nothing seems matter

 

http://buy.gellifique.co.uk - the shop

http://buy.gellifique.co.uk/_php_in_fo_.php - phpinfo

 

Following some recommendation, I increased memory_limit to 512M - didn't help. Tried using PHP 5.5 - the same. Nothing helps. Enabled error logging. Sometimes gets the following errors:

 

[21-Jul-2016 17:07:02 Europe/London] PHP Notice:  Undefined index: use_paypal_in_context in /homepages/28/d116680254/htdocs/clickandbuilds/PrestaShop/GellifiQue/cache/smarty/compile/d6/8c/6a/d68c6a718b05a798a098970d32e62d6d6aebbea2.file.express_checkout_shortcut_form.tpl.php on line 60
[21-Jul-2016 17:07:02 Europe/London] PHP Notice:  Trying to get property of non-object in /homepages/28/d116680254/htdocs/clickandbuilds/PrestaShop/GellifiQue/cache/smarty/compile/d6/8c/6a/d68c6a718b05a798a098970d32e62d6d6aebbea2.file.express_checkout_shortcut_form.tpl.php on line 60
 

or

 

[25-Jul-2016 14:32:10 Europe/London] PHP Notice:  Undefined index: use_paypal_in_context in /homepages/28/d116680254/htdocs/clickandbuilds/PrestaShop/GellifiQue/cache/smarty/compile/d6/8c/6a/d68c6a718b05a798a098970d32e62d6d6aebbea2.file.express_checkout_shortcut_form.tpl.php on line 60
[25-Jul-2016 14:32:10 Europe/London] PHP Notice:  Trying to get property of non-object in /homepages/28/d116680254/htdocs/clickandbuilds/PrestaShop/GellifiQue/cache/smarty/compile/d6/8c/6a/d68c6a718b05a798a098970d32e62d6d6aebbea2.file.express_checkout_shortcut_form.tpl.php on line 60
[25-Jul-2016 19:29:00 Europe/London] PHP Fatal error:  Uncaught  --> Smarty Compiler: Syntax error in template "/homepages/28/d116680254/htdocs/clickandbuilds/PrestaShop/GellifiQue/modules/paypal/views/templates/front/order-confirmation-mobile.tpl"  on line 64 "<a href="{$link->getPageLink('history.php', true, NULL, 'step=1&back={$back|escape:'htmlall':'UTF-8'}')}" data-ajax="false">{l s='Back to orders' mod='paypal'}</a>"  - Unexpected "htmlall", expected one of: "","" , ")" <--
  thrown in /homepages/28/d116680254/htdocs/clickandbuilds/PrestaShop/GellifiQue/tools/smarty/sysplugins/smarty_internal_templatecompilerbase.php on line 64

 

Seems to be random. But most of the time getting blank page does not produce any error in the log file,  so I'm not sure of these errors have any relation to the problem. But most probably they do

 

 

 

 

 

[RabbitZzZ]

I also have those notices in my PHP error log

 

PHP Notice: Trying to get property of non-object in [smarty-compile-directory]/file.express_checkout_shortcut_form.tpl.php on line 60

 

PS 1.6.1.9, Paypal 3.11.1, PHP 5.5

 

Anybody knows if that does any harm? Also had sometimes Problems with not generated orders from Paypal payments, but apperently no white screens.

[RabbitZzZ]

Anybody? Prestashop-Team?