OpenSP: Character data is not allowed here
Cause:
You have used character data somewhere it is not permitted to appear.
Mistakes that can cause this error include putting text directly in the
body of the document without wrapping it in a container element (such as
a <p>aragraph</p>) or forgetting to quote an attribute value
(where characters such as "%" and "/" are common, but cannot appear
without surrounding quotes).
Example:
 | textexample textexample |
 | textexample textexample |
Solution:
textexample textexample
References: