Office 365 is not currently supported here on QnA. I'd try asking for help in dedicated forums here.
https://answers.microsoft.com/en-us/msoffice/forum/msoffice_install
https://techcommunity.microsoft.com/t5/office-365/ct-p/Office365
--please don't forget to Accept as answer if the reply is helpful--
Regards, Dave Patrick ....
Microsoft Certified Professional
Microsoft MVP [Windows Server] Datacenter Management
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