[Bug]: Cart view doesn't show item when the amount field is custom

[pavlenex]

What is your BTCPay version?

1.11,0

How did you deploy BTCPay Server?

Docker

What happened?

We have a nasty bug where when an item amount type is custom it's not listed on the cart view for some reason.

How did you encounter this bug?

1. Create a new item or edit existing one
2. Set Price custom
3. Save
4. Preview cart, item is not listed (yes I am sure item is enabled)

Relevant log output

vue.min.js?v=RQP_FOA6ovPWyB3RlJeIqCW_T_fi6VDpso1V6bVQY_I:11 TypeError: Cannot read properties of undefined (reading 'classList')
    at Cr.addToCart (cart.js?v=cHi1FqDvDh0DMrlB6lZIxleMRhRYqH9TmoTRy75vYus:142:30)
    at click (eval at sc (vue.min.js?v=RQP_FOA6ovPWyB3RlJeIqCW_T_fi6VDpso1V6bVQY_I:11:104811), <anonymous>:3:2464)
    at dn (vue.min.js?v=RQP_FOA6ovPWyB3RlJeIqCW_T_fi6VDpso1V6bVQY_I:11:21974)
    at HTMLDivElement.r (vue.min.js?v=RQP_FOA6ovPWyB3RlJeIqCW_T_fi6VDpso1V6bVQY_I:11:10396)
    at i._wrapper (vue.min.js?v=RQP_FOA6ovPWyB3RlJeIqCW_T_fi6VDpso1V6bVQY_I:11:59525)
vn @ vue.min.js?v=RQP_FOA6ovPWyB3RlJeIqCW_T_fi6VDpso1V6bVQY_I:11
pn @ vue.min.js?v=RQP_FOA6ovPWyB3RlJeIqCW_T_fi6VDpso1V6bVQY_I:11
fn @ vue.min.js?v=RQP_FOA6ovPWyB3RlJeIqCW_T_fi6VDpso1V6bVQY_I:11
dn @ vue.min.js?v=RQP_FOA6ovPWyB3RlJeIqCW_T_fi6VDpso1V6bVQY_I:11
r @ vue.min.js?v=RQP_FOA6ovPWyB3RlJeIqCW_T_fi6VDpso1V6bVQY_I:11
i._wrapper @ vue.min.js?v=RQP_FOA6ovPWyB3RlJeIqCW_T_fi6VDpso1V6bVQY_I:11

What browser do you use?

No response

Additional information

No response

Are you sure this is a bug report?

• I confirm this is a bug report