I test with your survey with 3.15.0 / github : all 3 urls work.
Did you check with survey activated ?
Else : disable "Ajax mode" in template option.
Assistance on LimeSurvey forum and LimeSurvey core development are on my free time.
I'm not a LimeSurvey GmbH member. -
Professional support
-
Plugins, theme and development
. I don't answer to private message.