I have the same and even changing sys.txt didn't helped
And one more thing from every start up:
"Missing /storage/9016-4EF8/iGo/license.zip:/storage/9016-4EF8/iGo/license.zip: open failed: EACCES (Permission denied)"
Device:
Samsung Galaxy Tab S 8.4 (non rooted) Android 6.0.1
iGo "installed" on SD Card
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