<ul><li>Old Ubuntu versions with Ubuntu Pro enabled may cause 3rd party apps to refuse installation.</li><li>ESM apps have a higher package priority of 510, while most others default to 500.</li><li>To work around the issue, users can specify the package source in the apt command or set a higher priority for third-party packages.</li><li>Option 1: Specify package source in apt command. Option 2: Set higher priority for your PPA or package source.</li></ul>

3rd Party Apps Might Refuse to install due to Ubuntu Pro [Quick Fix]

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