com.beust.jcommander.MissingCommandException: Expected a command, got protected.apk

[lizsas]

I am trying to deobfuscate my apk file with dex-oracle but i have this error :

dex-oracle -i com.example.client protected.apk

Exception in thread "main" com.beust.jcommander.MissingCommandException: Expected a command, got protected.apk
at com.beust.jcommander.JCommander.parseValues(JCommander.java:725)
at com.beust.jcommander.JCommander.parse(JCommander.java:304)
at com.beust.jcommander.JCommander.parse(JCommander.java:287)
at org.jf.baksmali.Main.main(Main.java:90)
internal:dir:14:in open': wrong number of arguments (given 2, expected 1) (ArgumentError) from /var/lib/gems/3.0.0/gems/dex-oracle-1.0.5/lib/oracle.rb:63:in entries'
from /var/lib/gems/3.0.0/gems/dex-oracle-1.0.5/lib/oracle.rb:63:in enumerate_files' from /var/lib/gems/3.0.0/gems/dex-oracle-1.0.5/lib/oracle.rb:75:in parse_smali'
from /var/lib/gems/3.0.0/gems/dex-oracle-1.0.5/lib/oracle.rb:9:in initialize' from /var/lib/gems/3.0.0/gems/dex-oracle-1.0.5/bin/dex-oracle:91:in new'
from /var/lib/gems/3.0.0/gems/dex-oracle-1.0.5/bin/dex-oracle:91:in <top (required)>' from /usr/local/bin/dex-oracle:25:in load'
from /usr/local/bin/dex-oracle:25:in `

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