Problem
The description text contains strange characters, HTML code or is incorrectly formatted.
Possible cause
The text was likely copied from an external application such as Word or a website that adds hidden HTML formatting which the system cannot handle correctly.
Solution
Open the edit view for the class.
Delete the broken text and paste it as plain text (Ctrl+Shift+V).
Save and check that the text now looks correct.
If the problem persists, contact support and include details about:
The class name.
When the issue occurred.