Support » Plugins » Cannot install any new plugins

  • HI.

    I have inherited a site which was created by someone else (who i cannot contact).
    it has multiple plugins installed, and all are working fine.
    BUT – if i try and install a new plugin – I get the message:

    “The plugin does not have a valid header.”

    I have tried various plugins – and the same error with each.
    Also, if I try installing the same plugins on another WordPress installation, it works fine.

    I’ve tried installing via FTP as well as through the WordPress installer.
    Also, the plugin is not in a suddirectory – which is a common solution when googling the problem.

    Help!

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