Hello, when opening a package I received this message below - 

I have read similar content but cannot fix the issue. Most forum messages are related to older studio version. Is there any other way to fix this?

''Error processing command line arguments: The package project file was not found. A package should contain exactly one project file.

USAGE: SDLTradosStudio.exe [/help|/?] /arg1 val1 /arg2 val2

Task: Open Language Cloud Task
Description: Opens a Language Cloud Task in Studio
Usage: SDLTradosStudio.exe /openLCTask <sdlproject.lctask.languagecloud.sdl.com/
Arguments:
/openLCTask The URI of the Language Cloud Task to open

Task: Open Alignment
Description: Opens an alignment in the Alignment View.
Usage: SDLTradosStudio.exe /openAlignment <alignment>
Arguments:
/openAlignment The full file path to the alignment you want to open.

Task: Open Retrofit
Description: Opens a retrofit file in the Alignment View.
Usage: SDLTradosStudio.exe /openRetrofit <retrofit>
Arguments:
/openRetrofit The full file path to the retrofit file you want to open.

Task: Create Project
Description: Starts the Create Project wizard.
Usage: SDLTradosStudio.exe /createProject [/files <file1> [<file2> <folder1> ...]] [/name <name>] [/template <template>] [/referenceProject <referenceProject>]
Arguments:
/createProject Starts the Create Project wizard.
/files The full file path of one or more documents or folders to add to the Create Project wizard.
/name The name of the Project
/template An existing template name or file path to use.
/referenceProject An existing reference project file path to use.

Task: Open Document
Description: Opens a document or a number of documents in the Editor View.
Usage: SDLTradosStudio.exe /openDocument <document1> [<document2> ...]
Arguments:
/openDocument The full file path of one or more documents to open.

Task: Open File Based TM
Description: Opens a file based TM or a number of file based TMs in the TM View.
Usage: SDLTradosStudio.exe /openFileTm <file tm1> [<file tm2> ...]
Arguments:
/openFileTm The full file path of one or more TMs to open.

Task: Open Package
Description: Opens a package in the Package View.
Usage: SDLTradosStudio.exe /openPackage <package>
Arguments:
/openPackage The full file path of the package to open.

Task: Open Project
Description: Opens a project in the Projects View.
Usage: SDLTradosStudio.exe /openProject <project>
Arguments:
/openProject The full file path of a Project to open.

Task: Open Server Project
Description: Opens a server project in the Projects View.
Usage: SDLTradosStudio.exe /openServerProject <project URI>
Arguments:
/openServerProject The URI of a Server Project to open.

Task: NoAutoUpdate
Description: Starts the application without automatically checking for updates.
Usage: SDLTradosStudio.exe /noautoupdate
Arguments:
/noautoupdate Starts the application without automatically checking for updates.'''