diff --git a/FAQ.md b/FAQ.md
index 39f016f..7fe5dba 100644
--- a/FAQ.md
+++ b/FAQ.md
@@ -4,6 +4,12 @@
 * **OS X** - Install it using [Brew](http://brew.sh/): `brew install --cask kindle-comic-creator`.
 * **Linux** - Download it and place `kindlegen` executable in `/usr/local/bin`.
 
+#### MOBI conversion gets stuck (`"No such file or directory"` error for .mobi files)
+
+Make sure you have `kindlegen` in your machine, check the [download guide](https://github.com/ciromattia/kcc/wiki/Installation#kindlegen).
+
+If you are using the Flatpak version, install [Flatseal](https://flathub.org/apps/com.github.tchx84.Flatseal), a tool for managing permissions of applications installed via Flatpak. Use it to grant KCC the `All system files` permission.
+
 #### Kindle automatically zoom every corner of the page. How I can disable that?
 Panel View can be disabled directly on Kindle. There is no KCC option to do that.