I have installed limesurvey on my local server and make an alias with custom port (port 9443) public avaiable I can see my survey on every browser up and running ok , But on offlinesyrveys app i get this error. I have enable already json-rpc and create a valid ssl certificate , added to my webserver. However i cannot add my survey on the application. Could you help me?

Limeserver edition 5.6.8
latest offlinesyrveys app downloaded via google play store on Android 13 devices
 

I will reply to myself and to give answers to other users.
It was my fault that I only set my web address only on the form eg. www.example.com and not the full address www.example.com/id-of-survey . After that i can use offlinesurveys

Setting the full address of the survey, including the ID, in the form (e.g, www.example.com/id-of-survey ) resolved the issue and allowed you to use the OfflineSurveys app successfully. Dynamons world mod apk download   

Hello, I have the same problem with Offline Surveys but I don't understand how to fix it. Could you tell me what to do? Thanks

How does the URL at Limesurvey look like for that survey?

Which URL did you enter at OfflineSurveys?