since few weeks my implementation of harmony-api stop working

I'm using http request to do all:
http://192.168.1.1:8282/hubs/harmonyhub/devices/vivitek-projecteur/commands/
give me the correct commands
but as soon as I post any command after it's not working and give me a 404
e.g.
Cannot GET /hubs/harmonyhub/devices/vivitek-projecteur/commands/menu

that was perfectly working few weeks ago, the hamorny app still working correctly .... where did I missed something...?

edit: I also tried put it on a Pi (brand new) to test and it's the same...