Describes the cause and action for error messages.
Error Message(English)：
does not show home tab
Show or hide the ribbon in Office - Office Support
https://support.office.com/en-ie/article/show-or-hide-the-ribbon-in-office-d946b26e-0c8c-402d-a0f7-c・・・
Where are my worksheet tabs? - Excel - Office Support - Office 365
https://support.office.com/en-ie/article/where-are-my-worksheet-tabs-42623d50-2f9b-4583-ad9c-f1b3811・・・
Show the ribbon - Excel - Office Support - Office 365
https://support.office.com/en-us/article/show-the-ribbon-26abd81c-b5ab-47a5-aabc-a9e5255862f4
How to Restore a Toolbar on Excel : Excelling at Microsoft Excel ...
https://www.youtube.com/watch?v=i9aOdxAZprc
https://www.youtube.com/watch?v=i9aOdxAZprc
How to hide or unhide the ribbon (tabs) in MS Excel 2010 - YouTube
https://www.youtube.com/watch?v=zg5QWf-AcI8
https://www.youtube.com/watch?v=zg5QWf-AcI8
What To Do When Worksheet Tabs Go Missing | AccountingWEB
https://www.accountingweb.com/technology/excel/what-to-do-when-worksheet-tabs-go-missing
How to Manage the Excel Ribbon: 4 Key Tips You Should Know
https://www.makeuseof.com/tag/excel-ribbon/