Hi,
The same happens to me.
2021-07-15 10:40:52 | Information | Sync started (Default_MAESTRA).
2021-07-15 10:40:52 | Information | Connecting to Google...
2021-07-15 10:40:53 | Information | Connecting to Outlook...
2021-07-15 10:40:53 | Information | Cannot connect to Outlook, creating new instance....
2021-07-15 10:40:53 | Error | Cannot connect to Outlook.
Please restart GO Person Sync Mod and try again. If error persists, please inform developers on SourceForge.
2021-07-15 10:40:53 | Error | Sync failed.
2021-07-15 10:40:53 | Information | Reading version number from sf.net...

Using Go Contact Sync Mod 4.1.10, Microsoft 365 on Windows 10 21H1