sandbox for paypal not working

-- HikaShop version -- : 3.0.1
-- Joomla version -- : 3.6.5
-- Error-message(debug-mod must be tuned on) -- : my paypal sand box not working

I am writing this url for testing the sandbox paypal " www.sandbox.paypal.com/cgi-bin/webscr " but it alwasys seems internal server error after redirecting to this url. But when i changed this url to live " www.paypal.com/cgi-bin/webscr " everyhting is working fine. But i want to test it with sandbox first.Please see the attached screenshot and let me know the solution please.

I also checked the demo and set the url from backend to the payment method of paypal send box " www.sandbox.paypal.com/cgi-bin/webscr " but that doesn't work also.showing same error on demo too.

Hello

Did you contact Paypal support in order to check your sandbox Url ?
Paypal have in close time made some change in their Url, so maybe there is something news on this subject ?...

Awaiting news from you.

Regards

Same problem here. Last week Paypal in sandbox mode was working well, but few days ago it started to generate 500 internal server error before the payment. It only crashes in sandbox mode.

I would appreciate any news about that.

Thanks,

Hello,

I'm afraid that I have to ask you the same questions bas before :

Did you contact Paypal support in order to check your sandbox Url ?
Paypal have in close time made some change in their Url, so maybe there is something news on this subject ?

Regards,

Hello,
I have exactly the same problem. Is there anything new on the subject?

Thank you.

No news as far as I know. It's still failing when you use sandbox, but all is fine in production mode. I guess it's Paypal bug, I wrote to Paypal support two weeks ago and I'm still waiting for the response.