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Problem:
You are trying to install the WPML multilingual CMS and encountering errors such as 'Could not copy file' during installation and a fatal error upon activation. These issues persist even after attempting installation through different methods including OTGS, WordPress interface, and manual installation via cPanel.
Solution:
The issue appears to be related to your server rather than WPML itself. Here are the steps we recommend:
1. Check file permissions: Ensure that the

wp-content

folder and its subdirectories have the correct write permissions. Directories should generally have 755 permissions and files should have 644. You can set these using an FTP client or via SSH with the commands:

chmod -R 755 wp-content

(for folders)

chmod -R 644 wp-content/*

(for files)
2. Check disk space: Verify that your hosting account has sufficient disk space to complete the installation. Insufficient disk space can cause file copy operations to fail.
3. Consult your hosting provider: Since the problem persists even after ensuring file permissions and disk space, it might be related to specific server settings or PHP configurations. Discuss these issues with your hosting support.

If these steps do not resolve the issue or if the solution seems outdated or irrelevant to your case, we highly recommend checking related known issues at https://wpml.org/known-issues/, verifying the version of the permanent fix, and confirming that you have installed the latest versions of themes and plugins. If problems persist, please open a new support ticket.