Hi! Recently I change my apache/php server hosting and now i can't use my app because i get error 1103, the server is up.
The curious thing is that if I place a web browser with the same address then the POST form works correctly but if I remove the web browser then the POST form stops working.
It would really help if you provided a screenshot of your relevant blocks, so we can see what you are trying to do, and where the problem may be.
To get an image of your blocks, right click in the Blocks Editor and select "Download Blocks as Image". You might want to use an image editor to crop etc. if required. Then post it here in the community.