Hello. I tested your nice chat. I have to tell you that i am surprise because it offer a lot of options and they work fine.
I report to you the bugs that i found:
1) translator seems don't work, please let me know how i have to use it, maybe that i wrong something;
2) "disable" text present on the windows of languages in chat module isn't aligned correctly;
3) tooltip text of icon "save conversation" and "send file" is the same ("send file"). I think that it should be different;
4) problem with send file function: the box doesn't show the list of allowed file extensions (this is important for user), when user send file, he get this error "Upload directory does not have required permissionsFile ", why? But also with this error, he receive inthe chat windows the message "[Sent succesfully!]" and the other user that receive the file see the file name and once he click on its link to open it, he see this message "Sorry, the file doesn't seem to exist." Also please set that feature that once user click into link file to open it, automatically open the file in other browser window and not the same.
I hope that i'll help you.
For all the rest my compliments.
Thanks.
Best regards

using the translator: select the language to be translated, then when you receive a message, it will be translated automatically.

Disable text not aligned?? that is the default layout, you may change it(using CSS) as you wish using the theme editor from the backend or directly edit the required files.

tooltip text will be taken care of in the next release, we will add them to the language files.


list of allowed file extensions: that is a very good suggestion!!

Upload directory does not have required permissions: as the error states, your folder freichat/client/plugins/upload/upload doesn't have write permissions.

automatically open the file in other browser window and not the same: again a good suggestion.

Please note that the folder freichat/client/plugins/upload/upload have 755 chmod permissions. So do i have to set 777 chmod permissions?

yes you need write permissions, so it is better you change that folders permission to 777.