Sure you can, e.g., write a proper bug report at the source code repository (here for FileCase rsp. add info to the extant issue report) instead of dropping a generic message in this general SailfishOS forum.
There are many ways to contribute to Free / Open Source Software, besides writing program code.
In this specific case you might research the API changes Dropbox did years ago and how other Free Software written in C++ was adapted to this change: It may be just a matter of copying a few lines of code to resolve this issue.
I take what is offered and make a donation when I can.
- At least you openly define yourself as a scrounger; that is honest and sincere!
- I am not interested in donations, I am interested in contributions (see also below).
But seriosly, if you want to attract more people to linux and survive among big players, some of that “do it yourself” -ideology has got to go.
I do neither want or have to “survive among the big players”, I even do not want to “attract more people to linux”. But I do want to spend some spare time on other things than maintaining Free Software!
You seem to have a fundamental misconception here: Everybody who contributes to Free Software in her / his / its spare time does that, because they want a specific software to thrive: It is all about DIY and not at all ideological.
Furthermore, Free Software usually does not lack users, but always lacks contributors.
P.S.: Please name me a reason, why I should spend my spare time to resolve your issue, if you do not even ask nicely and are not willing to contribute in a suitable manner.