I noticed that the FinTS integration is currently unable to setup - at least with some banks.
The reason for this is that many banks only allows FinTS access with a valid product id. This id must be requested. The FinTS python library used inside HA says the following about this:
As of September 14th, 2019, all FinTS programs should be registered with the ZKA or banks will block access. You need to fill out a PDF form and will be assigned a product ID that you can pass above.
The official page for the registration process is only available in German: Register
Me or flirtysanchez could try get a product ID for HA. Is that OK or is this “too official” to be done by us?