Payment confirmation_url invalid signature error

[Adhil1]

When merchant visits this payment confirmation_url the page is stuck here, throwing the error as mentioned above.

Signature Error: Invalid Signature

[Adhil1]

When you get the confirmation_url from Admin billing api, before redirection do decodeURIComponent(javascript) of it. Sometimes the signature part of the confirmation_url might contain the symbols like '+'. In my case it was the url-safe encoding of the symbol + was coming as %2B. So above error will not occur always. So it's difficult to debug also. welcome