Oh No, we can't find your Pledge

The last two fundraisers I posted put out the following message after a donation is made through PayPal:

"Oh No, we can't find your Pledge. Sometimes it take a few moments for your Pledge to be logged. You can try refreshing this page"

The plugin worked correctly prior to the last two fundraisers.

I'll answer Jack Hittering's questions asked of another user with the same problem -
https://premium.wpmudev.org/forums/topic/fundraising-gives-a-pledge-unknown-message#post-409043

Do you have a screenshot of the error? - Yes, it's here - http://greendogfoundation.org/wp-content/uploads/2013/04/2013-04-18_2057.png

Are you using PayPal? - Yes

Are you using fundraising with rewards or no rewards? - No rewards

Multisite or single site install? - Single site

Can you check your error log? - Sure, if you tell me how.

A few more things:

The donations do come through, but the message presented makes people think they don't.

I have to manually enter the pledges received in order for them to be represented on the fundraising page.

Where do I go to clean up the punctuation and spelling for this error message?

Thanks for whatever help you can provide.