API PayPal error in Woocommerce - but they are correct?

[CrochetAM]

I need some help as I have a woocommerce shop where i sell subscriptions. It was all working fine up-until a month ago. Now it comes up with API error and I can't figure out why?

Any advice?

[MTS_Ciaran]

Can you post the API error you are getting, screenshots or API logs?

Also can you post a link of where we can test it?