i didn't change anything. the last everything worked fine. the only i did was to install some addons on one site. but on the other sites i did nothing.

It could be something with your hosting.. sometimes if they are making some changes or having some issues and the ftp drops the connection then this kind of thing may happen. I had the same issue last week.

Maybe ask your hosting company first or check your server status.. it may fix itself once they get themselves sorted out.. if it doesn't then just add that file list and your buttons will appear again in the file manager. :)

this site is running on my own server at home. it is just for testing.

kubuntu
apache
mysql

i have not changed there everything

when i put in the list of files it works.

thanks a lot

No worries.. glad It helped at least.

Not sure why that may have happened. Maybe the server timed out?

This made absolutely no sense =( When he puts in the list of files it works fine? what's the solution to this problem? It's happening to me and it's quite frustrating.

Thanks it works for me.. oh before if i check forum, i could stop 5 times re-installing of concrete5

what exactly worked for you?

ok doing what Wagdi said in the very beginning worked perfectly for me! Thank you Thank you Thank you Wagdi