Error during quote payment

Hello,
A guest is unable to pay invoice/quote # ORQ911540. He gets the following error:
" The was an error trying to submit your booking.
Fatal error occurred during booking.
Please use the buttons below to update your information and try again"
I logged in to processor/Braintree and no errors there.
Please let me know what could cause this.
Thank you,
Ella

We had an error earlier tonight based on an update pushed out. That should now be fixed.

Have the guest try again and let me know if it works this time.

They tried later at night and it worked. Thank you.
Ella