Hello there, muenstermann.

Thanks for trying out the steps given above and for sharing the results to us. I want to make sure this gets resolved.

In addition to the recommended steps above, we can try some basic browser troubleshooting to get rid of the Something is not quite right error message. 

Let's start by using a private browser when updating your credit card information.

Here are the following keyboard shortcuts for your reference:

• Google Chrome: Ctrl + Shift + N
• Mozilla Firefox: Ctrl + Shift + P
• Safari: Command + Shift + N

If it works in a private browser, try to log out and log back into your regular browser and clear the cache. This can help optimize the performance of your browser so you can start fresh. Otherwise, you may consider using other supported browsers.

On the other note, your issue about trying to delete a denied payment can be resolved by creating a new invoice then linking the new payment via check.

Before doing so, let's locate the denied payment. Then, create a service item to track the rejected bank transfer. (Instructions for this are outlined in the article below. Refer to Step 1 and Step 2).

Once done, you can record the rejected payment by creating a new invoice.

Here's how:

1. Got to the + New icon.
2. Select Invoice or Send Invoice.
3. Enter the customer who had the failed bank transfer payment.
4. Add the Rejected bank transfer item you created in step 2 to the invoice.
5. Enter the total amount of the rejected payment.
6. Make sure Tax is not selected.
7. Select Save and close.

After creating the invoice, proceed to the next step which is to move the original payment to the invoice you just created (continue Step 4 in this article): Handle a rejected or failed bank transfer payment.

Reach out to me if you have any other questions. I'm a few clicks away to help. Have a good day!