PayPal Checkout integration not working

I want to add a payment option to my form but every time I try and link my PayPal account it says failed, even after I've verified my email address. I've deleted the widget and restarted, but it just does the same thing again. 

May we know if you're using a business account with your PayPal or a free account?

I have tested my sample form and it seems the PayPal checkout integration is working at my end.

You may try clearing your browser's cache and re-integrate PayPal checkout.

Guide:https://www.jotform.com/help/542-How-to-Integrate-Form-to-PayPal-Checkout

Let us know if the issue still remains.

Hello Richie, 

Thank you. 

It is indeed a business account. 

I will clear my browser's cache & try again.

I've cleared my browser's cache, re-integrated the PayPal widget and the same thing happens. 

I say connect, the pop-up comes up, I fill in all the details, it says it's success and connected and that I have to verify my email address to see payments. I click the "Go back to Jotforms" button, it says connecting and then says "Failed". 

It seems you have followed the correct setup once you have finished logging-in to PayPal, you will need to click on Go back to JotForm Inc.

Can you please try using incognito or new private window or another web browser in setting up your PayPal integration?

If you have any add-ons in your browser, kindly disable them or your firewall.

Please give it a try and let us know if the issue still remains.

Hello Richie, 

Thanks for your response. 
I see now that I haven't received a verification email. Would this be causing the issue? 

I can see that the account email address on your JotForm account is verified. Please let us know which verification email are you referring to? Is it from PayPal?

I can assume there can be some software installed on your device, which is preventing normal connection of PayPal account. Also, a network related problem is possible. Could you try connecting the form using a different device -  a computer or mobile?

I've tried another browser, but now I get a new error. See attached screenshot. Then if I click the button that says Go back to Jotform Inc, I get an error on the whole screen saying

"You couldn't logged in successfuly.
Please check your paypal account settings"

On my PayPal account settings, I can see that Jotforms is connected.

Could you check if in your PayPal account any billing agreement or any account related data is pending? Probably that is causing the issue.