Syncthing-Fork gives a similar issue:

```
06-30 11:52:20.297 32469 32506 E Util    : Root is not available. Cannot fix permissions.
06-30 11:52:20.297 32469 32506 W ConfigXml: Failed to open config file '/data/user/0/com.github.catfriend1.syncthingandroid/files/config.xml'
```