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  • No, those are definitely errors, but could be because your AJAX responses contain HTML formatted PHP warnings and notices. This makes them useless to your AJAX response handlers.

    These specific errors could also be the result of throttling, but you would have to diagnose that with your provider.
      • 38121
      • 36 Posts
      @opengeek: thanks for your insights.

      I'm posting the final result in case it can help others diagnose the cause of the issue:
      - the internal error dialog in the manager was caused by all AJAX requests that load the tree to return an error 500,
      - the AJAX requests returned an error because of throttling done by the host (script execution time > 120s).