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Whenever I try to access my plesk filemanager i see the following error:

enter image description here

What could be causing this?



  1. Chosen as BEST ANSWER

    In my case an upgrade was prohibited because i had installed libapache2-mod-security, which interferes with the custom mod-security setup that plesk uses. I uninstalled mod security and upgraded my plesk install from 12.0.x to 12.5.x and now I don't see the error anymore.

    Note: Solution likely to be different for people experiencing the same issue

  2. What error are you getting in plesk error logs file ? Also please try to update your plesk panel to latest stable version.

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