We received one error message today from a donor, and are able to replicate it using Firefox and Chrome: if you fill out the first step of a donation via iDeal at https://donate.wikimedia.org/wiki/Special:FundraiserLandingPage?uselang=en&country=nl, when you press Continue the form does not process. The Netherlands campaign is not until late March but this is a popular method and we should fix this if possible or remove the option. We do have recent iDeal contribs in Civi, like 7508519545, so it's not certain when the error may have started.
After fiddling with this form for a bit the only one that consistently doesn't work for me is Friesland Bank, the forwarding seems to work for all the others. Friesland fails silently, maybe there's an error, we can do better.
This is throwing an error we don't have in the list: 400880
I see "No processors available" in the log but it doesn't error on the front end.
I will follow up with Ingenico about that error.