[Solved] Update JEM 2.2.2 to JEM 2.2.3 on Joomla 3.8.5 - ERROR

Updating JEM from 2.2.2 to 2.2.3 brings copy error.

Is there a way to get more information what's going wrong?
I've already turned on the debug mode with maximum debug information. In addition I've checked the write rights to the tmp and components folders. Everything seems to be ok.

Greetings
hike39

what do you mean with copy error? Can you make a printscreen, please.

See screenshot in the attachement

Hm... while trying to copy files of com_jem an error on file system level happened within Joomla's installer. Because JEM component contains files ton install on a lot of locations (/components + /administrator/components, but also on /media) it's difficult to find the reason.

You could search for "Copy file failed" in all php files on your site (or on /libraries/ ). You'll find something like For testing you can temporary change the message to e.g. to get a hint where to search the problem (I think a missed write permission). Try to update again and you'll see more info in the Warnung-Box.

THX Hoffi
your tip helped me a lot. Your suggestion should be integrated into .libraries/joomla/filesystem/folder.php

hike39 wrote: Your suggestion should be integrated into .libraries/joomla/filesystem/folder.php

I don't think Joomla guys will do that because such a message could be shown anytime a file copy fails, also to guests on frontend. So it would be a security issue to present hackers concrete file pathes. :ohmy:

But everbody having such a problem can of course temporary make the changes described here.