Many friends Destoon upgrade after the front and back to blank, the reason
is usually the file write permissions problems , mostly cache or files, testing did not consider security issues, all files are set to be writable to solve.
Therefore, it is recommended that the upgrade package upgrade as well as the installation files to determine the permissions of the file, or you will encounter strange problems.
Chmod-r 777/public_html
Interface can come out, but then found into the background prompt, license.txt can not be modified or deleted, please check, for this problem, modify the FTP software transfer mode for binary, will license.txt upload.
And for the initial installation of the background can not open, a blank situation, is generally a folder or file permissions are not set, such as the lack of "Iust_ your machine name" This user group permissions or its write permissions, set up, reinstall, you can.
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