Hi,

 

Did you ever change the

 

CuteSoft_Client\CuteEditor\Configuration\Security\Default.config ?

 

the code should contains <security name="filenamePattern">^[a-zA-Z0-9\._\s-\#]+$</security>

 

When you get the "File name not allowed" , the reason is the typed name is not match for the filenamePattern

 

Regards,
Terry