Why paypal don't let me enter refund amount saying "Expected total refund NaN"?

[mono25]

I agreed to buy items from Swanson total amout of $26.05.

A day later, PayPal emailed me that they paid to seller $29.01. without my permission.

In addition, PayPal entered another $2.96 pending payment to Swanson without my permission.

Pending of $2.96, because it is pending, there is nothing I can do. 

When I report a problem for $29.01, I have to put the total refund amount of $29.01 but, the paypal stoopped me from entering $29.01 saying,

"Expected total refund NaN".  i CANNOT PUT TOTAL REFUND AMOUNT THUS THE SYSTEM DOES NOT LET ME COMPLET THE REPORTING OF FULL REFUND.  WHAT SHOULD I DO?

[user06871137]

This was very frustrating. I avoided a refund for months, but I think I accidentally found a fix. Remove the shipping cost, and if you can't, close the tab, reopen it (ctrl+shift+t), and it will say we saved your information. Press continue and now you should be able to change all fields except the total.

[Moemoe42]

I too am having this issue!!!

[PayPal_Shradha]

Hello Everyone,

Welcome and thank your for posting your concern.

We are sorry to hear that you are unable to update the refund amount to proceed with issuing refund. Requesting to reach out to our customer support team during business hours by clicking the Contact option at the bottom of PayPal page. When you click on Contact option in PayPal website, you will get an option to contact via chat and phone. 

Hope this information is helpful for your!

Warm Regards,
Shradha 

[ZBUILDER]

Likewise, I have the same issue. This is an obvious problem with Paypal.