I am updating a customized shop from 1.6 to 1.9.
Going to 1.8, system/configuration for the "payment methods" is broken.
The page would simply not load, but just leave a white page, without any error message anywhere.
The URL is well defined ..index.php/admin/system_config/edit/section/payment/key/...
Changing the shop scope to a specific shop (here it is just language versions), the panel works.
(with the reduced configuration values for paypal)
Settings from the old shop, as far as seen, are correct.
Switching back to scope Default or Website again just brings a white page.
Server is still running with php 5.3
Any Idea what makes this panel broken?
Any settings that are not compatible from the old paypal implementation in 1.7 to the changed implementation in 1.8?
See if this fix addresses your issue:
It is more for the entire configuration screen, but it may be related.
thanks for the hint.
Finally it was some custom code copied over from the old version not working in 1.8
Removing the modified file, made the configuration page work again.
Now I know that everything changed and I have to rework all code modifications.