Hi everyone,

In latest OpenProject version (5.0.7), whenever Begin of the insertionI'mEnd of the insertion Begin of the deletion I’mEnd of the deletion editing pages in Wiki section, Begin of the insertion*Preview*End of the insertion Begin of the deletion **Preview**End of the deletion button Begin of the insertiondoesn'tEnd of the insertion Begin of the deletion doesn’tEnd of the deletion work anymore.

Begin of the insertionHere'sEnd of the insertion Begin of the deletion Here’sEnd of the deletion the relevant trace in Firefox debug console : Begin of the insertion
End of the insertion Begin of the deletion
End of the deletion application-dcd9f5d7a02fef7e22f7d28eb8d66018.js:62863 POST http://XXXX/projects/XXX/wiki/Wiki/preview 404 (Not Found) Begin of the insertion
End of the insertion Begin of the deletion
End of the deletion I created a hosted server (Free Trial) and I could reproduce this bug as well.

By the way, it seems there are some CSS rendering issues, especially when using <code> tag in Begin of the insertion<pre>End of the insertion Begin of the deletion

```
End of the deletion section.
Thanks in advance for your support.

Best regards,
Guillaume.