what does error code: 0x8019019a mean

I've got absolutely no tabs to use as you I do on excel or word. I can't check on any menu to bring down, and I have tried in settings to see, but nothing. I am on version Windows 10. I hope we can work it out, as the Outlook app always appears to be not user friendly.Anthony.

Which version of Outlook are you using?

Do you see the accountson the left-hand side?

I'm using a Office Home & Student 2019 package that was added to my already apps with Windows 10, if that helps. No, I do not see accountson on the left-hand side, plus not sure what that is? Anthony

Do you have a ‘File’ tab? If so click on this & choose account settings.

If not then please provide a screenshot of what you see.

Edit:

It seems that version does not contain Outlook email client. 

Are you referring to Outlook.com which is webmail?

No, I do not have ant file tab. When I got this computer in February only this year, Outlook app was already on my desktop with all the menus above with "Tools" etc., as my excel & word still have and use all the time. The others worked fine, but the outlook one kept saying I could not use until I activated that app. I tried everything to activate but could not, until it just turned into this, and you're right it changed into an outlook webmail and a browser which I never wanted. I've tried this morning restoring the app, but lost it, I've got it back as the webmail. Could you tell me how I can restore the original outlook back that came with the package, including Word/Excel/Powerpoint/OneNote & the Outlook, because it looks until I do, I can not fix the yahoo account. What I don't understand, it's been fine up to now fro August, when this app change finally took place as I se it. Sorry to go on, but I know you need all the facts, to be able to help me. Anthony