Hi @AntttMan790 - Did you find a solution to this or have you heard from @JLX89 maybe?
As a quick/minor side "service-note" @staff, the Community Guide link on the related app doc page is currently leading to a 404 error:
https://docs.cloudron.io/guides/community/firefly-iii-importer.md
I believe this should be:
https://docs.cloudron.io/guides/community/firefly-iii-importer