Anybody now a way to undo upgrade 3.4 and return to previous state?

I had a problem as I explained in Please help. All our system is not working properly after upgrade to 3.4 - #5 by baytan

When I tried to re-run the OJS from the previous directory, it just does not load the page. Previously, when I got a problem for the later version, I just change the working directory to the previous one and it just worked ok. For this time I cannot run a previous version of the OJS. Any body knows how to do it if I cannot overcome the problem in the link above?

Hi @baytan,

We strongly recommend creating backups and reverting to them if you run into issues upgrading:

PKP Team