Hi @Ph_We , remember that OJS is upgraded just making replacement of files and then you can execute the update function.
I follow this steps for install from GitHub:
and then, you need to follow some more steps:
https://pkp.sfu.ca/wiki/index.php?title=Github_Documentation_for_PKP_Contributors#Install_Composer_dependencies
Fo me was required “Install Composer dependencies”, but maybe you need “Install Node dependencies” too.
If you have access to SSH or local access this steps could work, but maybe not for shared hosting.
I’m also going to be attentive to see if anyone else helps with this, I think many of us are a bit confused about it.