diff --git a/src/app/debugger/debuggerUI/vmDebugger/DropdownPanel.js b/src/app/debugger/debuggerUI/vmDebugger/DropdownPanel.js
index 6d3b57d147..2004976005 100644
--- a/src/app/debugger/debuggerUI/vmDebugger/DropdownPanel.js
+++ b/src/app/debugger/debuggerUI/vmDebugger/DropdownPanel.js
@@ -99,7 +99,7 @@ DropdownPanel.prototype.update = function (_data, _header) {
 DropdownPanel.prototype.setContent = function (node) {
   if (!this.view) return
   var parent = this.view.querySelector('.dropdownpanel div.dropdowncontent')
-  parent.replaceChild(node, parent.firstElementChild)
+  if (parent) parent.replaceChild(node, parent.firstElementChild)
 }
 
 DropdownPanel.prototype.render = function (overridestyle) {
diff --git a/src/app/tabs/compile-tab.js b/src/app/tabs/compile-tab.js
index 955db1e7fd..5ce375812d 100644
--- a/src/app/tabs/compile-tab.js
+++ b/src/app/tabs/compile-tab.js
@@ -183,9 +183,6 @@ class CompileTab extends CompilerApi {
         <!-- Copy to Clipboard -->
         <div class="${css.contractHelperButtons} btn-secondary">
           <div class="input-group">
-            <div class="input-group-prepend">
-              <span class="input-group-text">Copy to clipboard</span>
-            </div>
             <div class="btn-group" role="group" aria-label="Copy to Clipboard">
               <button class="btn btn-secondary" title="Copy ABI to clipboard" onclick="${() => { this.copyABI() }}">
                 <i class="${css.copyIcon} fa fa-clipboard" aria-hidden="true"></i>
diff --git a/src/app/ui/card.js b/src/app/ui/card.js
index 0419a53971..0216b356c9 100644
--- a/src/app/ui/card.js
+++ b/src/app/ui/card.js
@@ -34,9 +34,11 @@ module.exports = class Card {
     function trigger (el) {
       var body = self._view.cardBody
       var status = self._view.statusBar
-      el.classList.toggle('fa-angle-up')
-      var arrow = el.classList.toggle('fa-angle-down') ? 'up' : 'down'
-      self.event.trigger('expandCollapseCard', [arrow, body, status])
+      if (el.classList) {
+        el.classList.toggle('fa-angle-up')
+        var arrow = el.classList.toggle('fa-angle-down') ? 'up' : 'down'
+        self.event.trigger('expandCollapseCard', [arrow, body, status])
+      }
     }
 
     // HTML