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ok i just found the solution, if it can be useful to other person:

Execute "dcomcnfg"
Open Component Services> Computers> My Computer> DCOM Config
Search for Microsoft Office Word 97-2003 Document (it will be something like this translated to your language, so take a while and search for it) <- Stuck at this one, can't find anything called "Microsoft Office ... "
Right-Click on it and open the properties
Choose "Identity" tab
Normally this is set to "the launching user". You have to change this to "the interactive user" or a admin user of your choice.
Apply these new settings and test your COM application. It should work fine now.

On my old computer, the office version was 2016, maybe this permission differs between the 2016 and 2019 version.

Thanks to the adim for following my problem

solution found on this topic:

https://stackoverflow.com/questions/12104775/cant-open-word-doc-with-com-in-php