Hello @br_muzikolog ,
You may wish to search for this error message on the forum:
There are a number of posts that describe users encountering issues and how they resolved
For example, see here: Quick Submit missing corresponding folder for plugin - #10 by Nicolas_Barrau
And here:
Application Version - e.g., OJS 3.3.0-6
Description of issue
Dear Tech Staff,
When I try to install Quick Submit plugin from plugin gallery. It is not showing install command rather it is showing upgrade command. When I click on upgrade, I received the reply that 'The uploaded plugin archive does not contain a folder that corresponds to the plugin name.
To resolve this issue, I tried to check the OJS folder and then plugin folder to find any subfolder with the name of quick submit. I tried to …
If you continue to encounter issues, it would be helpful to check your PHP error log messages to be able to pinpoint exactly where the issue is occurring.
-Roger