Minder crashes after mindmap is saved

Hi everyone,
I noticed that Minder crashes as soon as you saved/ serialized your first mindmap to a file.
Here is what the console outputs when you open Minder again:

~ >>> com.github.phase1geo.minder                                         [134]
I/O warning : failed to load external entity "/home/laurenz/.local/share/minder/favorites.xml"
I/O warning : failed to load external entity "/home/laurenz/.local/share/minder/exports.xml"
free(): invalid pointer
zsh: abort (core dumped)  com.github.phase1geo.minder

It is irrelevant if you open Minder via the launcher or by opening a saved file.
You can delete the config directory in “~/.local/share/minder” which makes it at least possible to open Minder again, but you still cannot open your saved mindmap.
I am using the latest Manjaro under Gnome.
Best wishes