Unable to create user ID

Hi there,

I have installed the V10 trial system by requesting a license key, and when I added users, click on Save button, faced below error message, what’s wrong with it?

The "Login Name" field is required. Yo umust provide a value for this field before saving.

for sure I have key in the Login Name - notice that the filed come with grey back ground.

thanks for helping in advance.

JX