TypeError: Cannot read property 'style' of null on line 4
    at SystemView.eval (eval at wrap (/home/system/gnak-legacy/node_modules/pug-runtime/wrap.js:6:10), :8:32)
    at SystemView.template [as _implementation] (eval at wrap (/home/system/gnak-legacy/node_modules/pug-runtime/wrap.js:6:10), :27:4)
    at SystemView.render (/home/system/gnak-legacy/framework/action/SystemView.js:31:28)
    at ViewHelper.render (/home/system/gnak-legacy/framework/action/ViewHelper.js:101:36)
    at async Function.processFallback (/home/system/gnak-legacy/framework/action/SystemView.js:64:33)
    at async Function.postProcess (/home/system/gnak-legacy/framework/action/SystemView.js:115:35)
    at async SystemView.render (/home/system/gnak-legacy/framework/action/SystemView.js:36:19)
    at async ViewResult.getContent (/home/system/gnak-legacy/framework/results/ViewResult.js:22:16)
    at async Function.postProcess (/home/system/gnak-legacy/framework/action/SystemView.js:113:35)
    at async SystemView.render (/home/system/gnak-legacy/framework/action/SystemView.js:36:19)