A family of Microsoft word processing software products for creating web, email, and print documents.
Hi Larry,
We appreciate the information you provided. The "Can't complete task. Office encountered a problem" error appears if the Microsoft account that you used to sign in doesn't match the app version that you have on your phone. Just to confirm, did you download the standalone Word app from your device's app store, or was it included in an Office 365 bundle? If it's included in Office 365, we suggest that you download the standalone Word app and log in using your second Microsoft account. If your original Microsoft account has an Office 365 subscription, use that account to log in instead.
Let us know if you're able to sign in to the Word app using these suggestions.