Where can I check where the cache files are located?

Hello. Is there a page somewhere in the plugin that will test my config? The plugin throws no error at all, but I cannot find where the cache files live.

I found via Google it is meant to be in wp-content/cache/ but it isn’t there.

– If the plugin cannot make its directory, it should throw an error IMO. I was completely unaware of this.
– The plugin should in it’s used backend display the path to cache somewhere, I shouldn’t have to google stack overflow answers to find out.

I am also now sure what the issue is, the cache dir exists and is owned by www-data:www-data with 775 so group-writeable.