the Captcha V2 no longer works Dolphin 7.4.2

Hello

I have to check the file permissions on my Dolphin 7.4.2 because the Captcha V2 no longer works.

I use my SSH

find ./ -type d -exec chmod 755 {} \;

find ./ -type f -exec chmod 644 {} \;

Unfortunately, my Ubunto on Plesk does not react to these two commands

chmod 755 flash / modules / global / app / ffmpeg.exe;

This command is wrong

Do you have suggestions?

ffmpeg.exe has nothing to do with the captcha.  However, if you need to change permissions on ffmpeg.exe, try changing into the directory and then issuing the chmod command.  chmod works the same on Ubuntu as it does on CentOS.

 it is not about the ffmpeg.exe;

but why these "CHMOD" commands do not work on Ubunto.

Maybe they are misspelled?

Those are basic linux commands; not sure why you are having issues.

I'm not familiar with Plesk, but surely it allows you to change permissions without using Chmod. If it's similar to other Panels like cPanel, you should be able to change permissions in Plesk's File Manager. Although using the Command Line is useful from time to time, in my opinion non-programmers or people who rarely use it should find ways of doing these things via the Control Panel.

You can also easily change permissions using Filezilla or WinSCP. 

I had done with Filezilla now

although I also work with SSH and without problems.

Unfortunately, the 755/644 check did not work.

My Plesk prevents the Captcha on several Dolphin pages.

Plesk support can not understand what problem.

Probably call my Plesk predecessor to call again.

He had no problem with Captcha.

Thank you