Hello. Tamara Andersen
Thanks for using Microsoft products and posting in the community.
I would be honored to help you with your problem.
I realize that you've encountered a problem of OneDrive.
Here are some ways you can refer to below:
1.Network problem.
Turn off the computer and WiFi, wait for some time, and then turn on the device to connect to the network.
You can also try to use the computer to connect to the mobile phone hotspot, to log into office.
Turn off the firewall and antivirus software, and when it will be blocked by these systems.
Disclaimer: Temporarily turn off antivirus protection. However, keep in mind that if you do so, your device may be vulnerable to threats. So please turn it on immediately once issue fixed.
You can try to change the DNS to log into the network.
Open the "Control Panel", select "Network and Internet", and click on "Network and Sharing Center".

Click on the blue text after the "Connections:" icon.

Right click on the connected network and select "Properties".

Double click on 'Internet Protocol Version 4 (TCP/IPv4)'.
Select 'Use the following DNS server address' and enter the following address:
Preferred DNS Server: 4.2.2.1
Backup DNS Server: 4.2.2.2
Click 'OK' and then try to start OneDrive again.
2. Log in to the web version of OneDrive.
Log in to OneDrive.live.com.
Check if there is any problem with the account and check if the OneDrive memory is full.
With when OneDrive memory is full, it can also cause problems.
3.Use ailias
Signing out of OneDrive and shutdown OneDrive.
Open a browser and visit https://account.microsoft.com/. Sign in with your Microsoft account and password.
Go to the Account Information page: Once you are signed in, click on ‘Your Information’ at the top of the page.
Then in the ‘Account info’ section, click ‘Manage account info’.
click“Add a email”
enter a new email address and confirm. Select ‘Add’ and complete the validation. The new email will become your alias.
Set Primary Alias: Next to an existing alias, click ‘Set as Primary Alias’ to set it as your primary login email.
Sign in to OneDrive using an alias
4. Reinstall OneDrive.
This method basically solves all the problems caused by OneDrive itself.
Download the OneDrive App for PC, Mac, Android, or iOS – Microsoft OneDrive
Let me know if this is contrary to what you need.
Best regards.
Petter.Y - MSFT | Microsoft Community Support Specialist