Gutted it stopped again
Edit History
Hi Pascal,
Absolutely gutted, it stopped working again 
To answer your questions
1) i think i wrote a different paypal version (older version) in a previous post because at that moment when i checked we were probably trying out an older paypal module just incase (which didnt work) BUT, we've used the latest version of the paypal module for months now, and it always worked. When we upgraded we already had the latest version, it worked after the upgrade too (for a few days).
2) Yes we use the latest version now.
So as per my previous post after weeks of not being able to fix paypal we bit the bullet and installed an old prestashop backup version (which was 1.4.7), and had to upgrade prestashop again and our paypal problem was finally fixed, JOY!!! (for about 48 hours)
Thn, exactly the same sequence of events as last time (2 weeks ago)
We upgrade, from 1.4.7 to 1.6.0.11 of prestashop
Using the latest version of paypal before and after the upgrade (paypal europe)
receive paypal orders PERFECTLY for a few 1-2 days as its the weekend and our developer is not working.
Then he starts work (saturday morning) and starts going through the tasks one by one, simple front end tasks like changing the colors of this and that, changing the width of stuff etc and the same day paypal stops working. Just to be clear i'm not blaming our developer, but something is going wrong when he starts to work on the site (front end design changes).
When this happened two weeks ago eg, we upgrade prestashop, paypal works perfect for 2 days, developer starts to work on the site and same day paypal stops working, we did a similar set of front end changes. Ill post his list of changes below.
Also i kept a log for the first 24 hours of changes i made in the back office, non of these changes had a negative effect on paypal or orders (log below) because paypal continued to work after these changes.
As soon as the paypal payment error was noticed we also noticed the below screenshot error if you try to change your address in the checkout ''Technical error.......''
One last note, when i go to Back Offoce > Modules > Positions > and click the ''Show'' drop down tab at the top of the lists of modules, paypal is not there?
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My log of changes (for me, not the developer) for the first 24 hours which did NOT effect paypal or the website)
1 - changed ''force compile'' to ''recompile templates only if the files changed'' (10am, 30th january)
2- turned OFF ''disable all overrides'' and 'disable non prestashop modules'' (10am, 30th january)
3) caching type changed from ''file system'' to mysql
4) update module ''Cart block v1.5.2'' to latest version (3pm, 30th jan)
5) update module ''categories block'' V2.8.4 to v2.8.6 (3.20pm, 30th jan)
6) unistalled ''scroll to top'' module (3.25pm, 30th jan)
7) disable ''banner block'' the banner at top of website (3.30pm, 30th jan)
8) removed left hooks from product page to make it 1 column (4.30pm, 30th jan)
9) updated and enabled ''cross-selling'' module
10) updated module Facebook Like Box block v1.3.3 - by PrestaShop (4.30pm, 30th jan)
11) enabled module: Favorite Products v1.2.3 - by PrestaShop
12) put cross selling module into product page footer (5.40pm)
13) removed module ''jGallery View 2 v1.3.2''
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My developers tasks for the day..
1) change color of text inside dropdown menu from top purple menu. The text inside the drop down pls change color to #454545
2) - like before, some of the icons are no longer displaying and are display a question mark ''?'', for example look in footer or breadcrumbs you will see ''?''
3) - BREADCRUMBS - i would like to remove breadcrumbs from 1) all cms pages 2) from checkout page like this http://babyoutlet.ph/quick-order 3) from contact us page
Please go to prestashop and read post 8 and post 9. it explains how to do this. BUT becareful i dont know if they are using our version https://www.prestashop.com/forums/topic/171266-solved-how-to-remove-breadcrumb/
4) - in purple top navigation menu, ''ALL MANUFACTURERS'' (or now called BRANDS), in the drop down for this, please remove uppcase for the font
5) purple navigation menu, change ''all manufacturers'' text to ''Brands''
6) left column headers (for example where text ''NARROW BY'' is located),
- please change background color to purple same as purple as navigation menu.
-Also the text inside headers of left column need to change to WHITE text. also below job for this.
- Change text font size in left column headers to 14px
- remove ''border-top'' for left column headers
- decrease height of left column headers by 50%
- Decrease width of WHOLE left column from 293px to 265px or decrease by 10% if its not using 'px' for width size. This means visually the width of this section should now be smaller
7) search bar, increase width by 30% and then re align nicely
8) top grey bar, FAQ, NEXT DAY DELIVERY, HOW TO ORDER, CASH ON DELIVERY, RETURNS ACCEPTED right now the spacing between them is 10px, please increase to 12px
9) change purple navigation menu HEIGHT from 55px to 45 px
- also mouse hover on menu text right now is BLUE, please change to white (you will also need to change hover color of TEXT to black/dark grey
- so mouse hover will now be white but we also right now have another color which is the color of the selected menu, in the purple bar. this right now is blue for selected menu, please change this so its not blue anymore but its purple (menu color)
10) the header, right now i believe header is section (section with white background at top i mean) is about 126px height. We would like to try smaller, maybe 110px, pls try and then let me see
11) we add some new design for the checkout, we will remove some text, add BORDERS to each section, and then add new header design for each section, as shown in this image.
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Ok ive been trying to add screenshots but not sure how to do it, so....
1) screenshot was was when i was in the front end, going through the checkout and decided to change my address i got a little pop up box saying
''TECHNICAL ERROR: unable to save address details. Error thrown: [object Object] text status: error
2) second screenshot was simply a whit blank screen that you get after completing paypal payment.