When attempting to migrate files from Network File Share server to SharePoint online communication site with SPMT Migration Tool (latest version)
with a site collection admin (not SharePoint online service admin)
the following error is received on SPMT Tool:
"Cannot detect the SharePoint Online admin site URL for the site 'https://tenantname.sharepoint.com/sites/destinationsite' and user '' (ErrorCode: 0x02010026)"
this error and ErrorCode: 0x02010026)" is not listed in the Troubleshooting common SPMT issues and errors reference
https://docs.microsoft.com/en-us/sharepointmigration/troubleshooting-common-spmt-issues
since we want local admin to migrate Network File Share server without SPO service admin rights can you enlighten on cause and solution for this error

