attempt to create directory in /storage/emulated/0 fails

When running 1.2.1 via f-droid on CM13, I get the message "Cannot create /storage/emulated/0/Mercury-SSH"
The logcat is:
12-11 18:52:16.740  2396  3067 I ActivityManager: Start proc 13558:it.skarafaz.mercury/u0a117 for activity it.skarafaz.mercury/.activity.MainActivity
12-11 18:52:16.960 13558 13558 W System  : ClassLoader referenced unknown path: /data/app/it.skarafaz.mercury-1/lib/arm
12-11 18:52:17.300 13558 13558 W art     : Before Android 4.1, method android.graphics.PorterDuffColorFilter android.support.graphics.drawable.VectorDrawableCompat.updateTintFilter(android.graphics.PorterDuffColorFilter, android.content.res.ColorStateList, android.graphics.PorterDuff$Mode) would have incorrectly overridden the package-private method in android.graphics.drawable.Drawable
12-11 18:52:17.405 13558 13572 D OpenGLRenderer: Use EGL_SWAP_BEHAVIOR_PRESERVED: false
12-11 18:52:17.465 13558 13572 D libEGL  : loaded /system/lib/egl/libEGL_mali.so
12-11 18:52:17.475 13558 13572 D libEGL  : loaded /system/lib/egl/libGLESv1_CM_mali.so
12-11 18:52:17.520 13558 13572 D libEGL  : loaded /system/lib/egl/libGLESv2_mali.so
12-11 18:52:17.570 13558 13572 E         : Device driver API match
12-11 18:52:17.570 13558 13572 E         : Device driver API version: 29
12-11 18:52:17.570 13558 13572 E         : User space API version: 29 
12-11 18:52:17.570 13558 13572 E         : mali: REVISION=Linux-r3p2-01rel3 BUILD_DATE=Tue Aug 26 17:05:16 KST 2014 
12-11 18:52:17.570 13558 13572 I OpenGLRenderer: Initialized EGL, version 1.4
12-11 18:52:17.825  2396  3075 I ActivityManager: START u0 {act=android.content.pm.action.REQUEST_PERMISSIONS pkg=com.android.packageinstaller cmp=com.android.packageinstaller/.permission.ui.GrantPermissionsActivity (has extras)} from uid 10117 on display 0
12-11 18:52:17.840  2396  3001 W InputMethodManagerService: Focus gain on non-focused client com.android.internal.view.IInputMethodClient$Stub$Proxy@ca14cea (uid=10117 pid=13558)
12-11 18:52:17.905  2396 12632 D NetlinkSocketObserver: NeighborEvent{elapsedMs=84997653, 192.168.0.1, [009027A212EF], RTM_NEWNEIGH, NUD_STALE}
12-11 18:52:18.135  2984  2984 I HK/LatinKbdBaseView: closing org.pocketworkstation.pckeyboard.LatinKeyboardView{6199360 V.ED..... ......ID 0,0-720,320 #1020026 android:id/keyboardView}
12-11 18:52:18.175  2396  2425 I ActivityManager: Displayed com.android.packageinstaller/.permission.ui.GrantPermissionsActivity: +273ms (total +1s462ms)
12-11 18:52:20.860  2396  3001 D VoldConnector: SND -> {12 volume remount_uid 10117 read}
12-11 18:52:20.860  1912  1963 D vold    : Remounting 10117 as mode read
12-11 18:52:20.860  1912  1963 E vold    : Failed to readlink: No such file or directory
12-11 18:52:20.860  2396  2529 D VoldConnector: RCV <- {400 12 Command failed}
12-11 18:52:20.860  2396  3001 W MountService: Failed to remount UID 10117 as read: com.android.server.NativeDaemonConnector$NativeDaemonFailureException: command '12 volume remount_uid 10117 read' failed with '400 12 Command failed'
12-11 18:52:20.860  2396  2407 D VoldConnector: SND -> {13 volume remount_uid 10117 write}
12-11 18:52:20.860  1912  1963 D vold    : Remounting 10117 as mode write
12-11 18:52:20.860  1912  1963 E vold    : Failed to readlink: No such file or directory
12-11 18:52:20.860  2396  2529 D VoldConnector: RCV <- {400 13 Command failed}
12-11 18:52:20.865  2396  2407 W MountService: Failed to remount UID 10117 as write: com.android.server.NativeDaemonConnector$NativeDaemonFailureException: command '13 volume remount_uid 10117 write' failed with '400 13 Command failed'
12-11 18:52:20.945 12822 12835 D OpenGLRenderer: endAllStagingAnimators on 0x4e150db0 (RippleDrawable) with handle 0x4dce0cc0
12-11 18:52:21.135  1987  1987 W SurfaceFlinger: couldn't log to binary event log: overflow.
Skarafaz / mercury

attempt to create directory in /storage/emulated/0 fails #15
