diff --git a/client/src/components/infoview/main.tsx b/client/src/components/infoview/main.tsx
index a230f45..6316e89 100644
--- a/client/src/components/infoview/main.tsx
+++ b/client/src/components/infoview/main.tsx
@@ -413,63 +413,67 @@ export function CommandLineInterface(props: { world: string, level: number, data
     <div className="content" ref={proofPanelRef}>
       <ExerciseStatement data={props.data} />
       <div className="tmp-pusher"></div>
-      {proof.length ? proof.map((step, i) => {
-        if (i == proof.length - 1 && hasInteractiveErrors(step.errors)) {
-          // if the last command contains an error, we only display the errors but not the
-          // entered command as it is still present in the command line.
-          // TODO: Should not use index as key.
-          return <div key={`proof-step-${i}`}>
-            <Errors errors={step.errors} commandLineMode={true} />
-          </div>
-        } else {
-          return <div key={`proof-step-${i}`} className={`step step-${i}` + (selectedStep == i ? ' selected' : '')} onClick={toggleSelectStep(i)}>
-            <Command command={step.command} deleteProof={deleteProof(i)} />
-            <Errors errors={step.errors} commandLineMode={true} />
-            {mobile && i == 0 && props.data?.introduction &&
-              <div className={`message information step-0${selectedStep === 0 ? ' selected' : ''}`} onClick={toggleSelectStep(0)}>
-                <Markdown>{props.data?.introduction}</Markdown>
+      {proof.length ?
+        <>
+          {proof.map((step, i) => {
+            if (i == proof.length - 1 && hasInteractiveErrors(step.errors)) {
+              // if the last command contains an error, we only display the errors but not the
+              // entered command as it is still present in the command line.
+              // TODO: Should not use index as key.
+              return <div key={`proof-step-${i}`}>
+                <Errors errors={step.errors} commandLineMode={true} />
               </div>
-            }
-            {mobile && <>
-              <Hints key={`hints-${i}`}
-                hints={step.hints} showHidden={showHelp.has(i)} step={i}
-                selected={selectedStep} toggleSelection={toggleSelectStep(i)}/>
-              {i == proof.length - 1 && hasHiddenHints(proof.length - 1) && !showHelp.has(k - withErr) &&
-                <Button className="btn btn-help" to="" onClick={activateHiddenHints}>
-                  Show more help!
-                </Button>
-              }
-            </>
-            }
-            <GoalsTab proofStep={step} />
-            {/* Show a message that there are no goals left */}
-            {!step.goals.length && (
-              <div className="message information">
-                {completed ?
-                  <p>Level completed! 🎉</p> :
-                  <p>
-                    <b>no goals left</b><br />
-                    <i>This probably means you solved the level with warnings or Lean encountered a parsing error.</i>
-                  </p>
+            } else {
+              return <div key={`proof-step-${i}`} className={`step step-${i}` + (selectedStep == i ? ' selected' : '')} onClick={toggleSelectStep(i)}>
+                <Command command={step.command} deleteProof={deleteProof(i)} />
+                <Errors errors={step.errors} commandLineMode={true} />
+                {mobile && i == 0 && props.data?.introduction &&
+                  <div className={`message information step-0${selectedStep === 0 ? ' selected' : ''}`} onClick={toggleSelectStep(0)}>
+                    <Markdown>{props.data?.introduction}</Markdown>
+                  </div>
                 }
-              </div>
-            )}
-            {completed && i == proof.length - 1 &&
-              <div className="button-row">
-                {props.level >= props.worldSize ?
-                  <Button to={`/${gameId}`}>
-                    <FontAwesomeIcon icon={faHome} />&nbsp;Leave World
-                  </Button>
-                :
-                  <Button to={`/${gameId}/world/${props.world}/level/${props.level + 1}`}>
-                    Next&nbsp;<FontAwesomeIcon icon={faArrowRight} />
-                  </Button>
+                {mobile && <>
+                  <Hints key={`hints-${i}`}
+                    hints={step.hints} showHidden={showHelp.has(i)} step={i}
+                    selected={selectedStep} toggleSelection={toggleSelectStep(i)}/>
+                  {i == proof.length - 1 && hasHiddenHints(proof.length - 1) && !showHelp.has(k - withErr) &&
+                    <Button className="btn btn-help" to="" onClick={activateHiddenHints}>
+                      Show more help!
+                    </Button>
+                  }
+                </>
                 }
+                <GoalsTab proofStep={step} />
+                {/* Show a message that there are no goals left */}
+                {!step.goals.length && (
+                  <div className="message information">
+                    {completed ?
+                      <p>Level completed! 🎉</p> :
+                      <p>
+                        <b>no goals left</b><br />
+                        <i>This probably means you solved the level with warnings or Lean encountered a parsing error.</i>
+                      </p>
+                    }
+                  </div>
+                )}
               </div>
             }
-          </div>
-        }
-      }) : <CircularProgress />}
+          })}
+          {mobile && completed &&
+            <div className="button-row">
+              {props.level >= props.worldSize ?
+                <Button to={`/${gameId}`}>
+                  <FontAwesomeIcon icon={faHome} />&nbsp;Leave World
+                </Button>
+              :
+                <Button to={`/${gameId}/world/${props.world}/level/${props.level + 1}`}>
+                  Next&nbsp;<FontAwesomeIcon icon={faArrowRight} />
+                </Button>
+              }
+            </div>
+          }
+        </>
+      : <CircularProgress />}
     </div>
     <CommandLine proofPanelRef={proofPanelRef} />
   </div>