I'm trying to save the 3 API credentials that PayPal Website Payments Standard asks to be filled, but once I enter them and hit Save, the default values are back in place (strange).
The fields I'm referencing are:
- API Username
- API Password
- API Signature
I have tried to tweak some of the rest of the options for that section, but the problem remains.
I also tried to save them from an uncached browser. I have the caches disabled. I tried to save them after logging out, and then logging in.
Additionally, I get this error when testing on the frontend (but this is, I guess, because the default details are in place and refusing to leave):
PayPal gateway has rejected request. Security header is not valid (#10002: Security error).
Do you have any idea where the culprit can be? Thanks,