Error code 30068 is a typical message that occurs during the Office installation. This is applicable for various office programs in common. Something like office 365, office 2021 and office 2019 as well. There are different trail numbers showing in the error message .
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Getting error Code 30068-44 during Office Installation?
Error 30068 reasons and steps to solve this are explained in this article. Some necessary precaustions are given to not to loose your data...
https://www.officelivesupport.com/microsoft-office-installation-error-code-30068-4/