Hello,
Can you please help me add a custom button on the Payments tab of the Sales Order screen?
In which extension should the new button be created?
When I try to add it in the Sales Order extension, I get the following error message.

Hello,
Can you please help me add a custom button on the Payments tab of the Sales Order screen?
In which extension should the new button be created?
When I try to add it in the Sales Order extension, I get the following error message.

Best answer by Vard03
This issue occurred when I was trying to add the button from the customization project. I added it directly in the ASPX, and the issue was resolved. However, I didn’t understand why it wasn’t possible to add it through the customization project.
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