So I've spent a few frustrating hours trying to book a trip from Strasbourg to Heidelberg.

I get all the way through the menu up to putting in my CC info and then get rejected.


I've tried on multiple computers, attempted both with my AMEX and my MC, and confirmed (just in case) with the credit card companies that the international payment isn't being blocked.



I was able to easily complete a ZRH to Srasbourg on SBB earlier in the same day.


Helpful thoughts?