In order to be able to integrate your (Bitwala, Kontist, Penta, Finom or Tomorrow) account into fino, it must be made accessible as a third-party provider (TPP) on the bank side. This activation is only necessary the first time and is done via Solarisbank at https://my.solarisbank.de/portal. Instructions can be found in the bank's FAQs at https://xs2a-portal.solaris-sandbox.de/#/apis/25/187 (see last point). If this does not work, please ask your bank advisor for help.
There are currently some problems with the initiation of payments.