Error while trying to initiate a free trial

I’m still running some tests.
This time, with trials.

The only available manual payment method is Cash on Delivery (COD). No custom options.

When trying to sign up for a trial, this error appears.

I’m not sure if this is an actual bug or simply a limitation of COD for trial-based subscriptions - which would make sense, given how COD works.

However, this highlights again the need for a true “Manual Payment” option rather than just COD.

COD is typically designed for physical product deliveries, not online services or subscriptions. Many users could easily mistake COD for a generic manual or offline payment, which can create confusion.

Matthew Hawthorn bring a similar issue here too and we discussed on the topic (for more context).