Problem with upgrade ojs3

[ajnyga]

Hi,

Your earlier screenshot does mention Debian as the platform type, which is Linux.

There are two things to consider here:

1. The file/folder permissions. I do usually have 755 for folders, but I guess that 750 should work as well.
2. The owner of “cache”, “public” and “files” folders. The owner should be set so that PHP scripts can write to the folders. What the correct owner is, depends on the server. It could be for example “apache” or “www-data”.

Maybe this thread will help you:

PKP PLN Plugin ask for Archive_Tar PHP extension

Equally important to the numeric permissions is the file ownership. For example, ownership of apache:www with permissions of 750 means that the apache user can read, write and execute; anyone with the www group can read or execute; and the file is protected against access by anyone else. Note that “execute” means two entirely different things for directories than for files! In general, you want your permissions set such that your webserver can read and write (recursively) to config.inc.php’s …

I really do not have any other advice than that you find out the owner of cache, public and files. It may be that there are some other problems as well, but that would be the best starting point in my opinion.