Steps to reproduce:

1. Open Host wizard
2. Search for Websites templates
3. Apply Website by Browser template
4. Create Host and Group
5. On step Configure host - leave Mandatory field Path - empty as is
6. Click Next

Result:
Inline validation is fired up. 

"This field cannot be empty."

Incase any data is entered into field. Inline validation stays failed with error message.

Button Next becomes disabled.

They only workaround is to change field type from text to Secret and then back to Text. 

Then inline validation for this field becomes disabled

Expected:
Inline validation works in case field is empty, error will be shown

and validates field correctly if data is entered.