Microsoft Office Error Code 30145-27 can occur when someone tries to update or install Microsoft Office 2016 or Office 365. There are multiple reasons due to which Error Code 30145-27 occurs which include: –

Firstly, Insufficient Disk Space

Network Connection Errors

Registry Conflicts

Firewall or Proxy Rules

https://www.officelivesupport.com/microsoft-support-error-code-30145-27/