log and error reporting

I was having a hard time compressing an image, the size would never shrink whatever the quality I set. It was like Resmushit was working and trowing away the result.

Then I remember that also Wp-Optimize uses Resmush.it web service and gave it a try.
On the very same image I got from Wp-Optimize
“function(){return f&&(c&&!b&&(h=f.length-1,g.push(c)),function b(c){n.each(c,function(c,d){n.isFunction(d)?a.unique&&j.has(d)||f.push(d):d&&d.length&&"string"!==n.type(d)&&b(d)})}(arguments),c&&!b&&i()),this}<br>There was an error connecting to the image compression server. This could mean either the server is temporarily unavailable or there are connectivity issues with your internet connection. Please try later.”

Now the explanation is simple: the web service Resmush.it is somewhat down, the plugin Resmush.it is waiting for the webservice (hence the delay and the appereance of work) but actually is just saving the original file over.

Please do implement some kind of error reporting! If the service is down I can do it tomorrow or the next month, without wasting time.
Second: in the options panel there’s a flag to turn on logging BUT there’s no hint to the name and location of the logfile. I read somewhere here around it should be called resmushit.log, but found no log on the file system. Why is that?

Thank you for you patience and work. Tell me if I can help