Begin of the insertion### **Environment**:

qa-edge

OpenProject 11.2

### **Steps to reproduce:**

1. Go to wiki page (e.g. [https://qa.openproject-edge.com/projects/test-robin-9-12-2020/wiki/wiki)](https://qa.openproject-edge.com/projects/test-robin-9-12-2020/wiki/wiki))
2. Edit wiki page and make change (e.g. change heading).
3. Save wiki page.

### **Actual Behavior**

Error shown & wiki page not saved.

<figure class="image op-uc-figure"><div class="op-uc-figure--content"><img class="op-uc-image" src="/api/v3/attachments/20583/content"></div></figure>



<figure class="image op-uc-figure"><div class="op-uc-figure--content"><img class="op-uc-image" src="/api/v3/attachments/20582/content"></div></figure>

### **Expected Behavior**

Wiki page saved.End of the insertion