Error on preview

hello, when I try to preview my form, I get this error message that appears :
An error occurred while loading this form. It is recommended that you do not use this form to enter data until it is resolved.

Please contact by including the link to this page and the error message below:

PCDATA invalid Char value 2

Welcome to the community, @junior98! Have you validated your XLSForm through this online validator? The online validator should be able to identify your syntax issues if present.