fix(utils): Check if app exists before checking isPackaged

[faribauc]

Description

app may be null or undefined

Additional context

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What is the purpose of this pull request?

• [X] Bug fix
• [ ] New Feature
• [ ] Documentation update
• [ ] Other

Before submitting the PR, please make sure you do the following

• [X] Read the Contributing Guidelines.
• [X] Read the Pull Request Guidelines and follow the Commit Convention.
• [X] Provide a description in this PR that addresses what the PR is solving, or reference the issue that it solves (e.g. fixes #123).