i am using tab a9+ (sm-x210) when i was open a robot on r desing android version. i can not view robot. My screen is empty. Help me.
Android vers. 14
Just hard reseted. My englis not good i am sory 
i hope you are understand me.
Have you tried to uninstall it completely and then reinstall it via Google Play web site?
Yes i tried it. But its not worked.
On my S6 Lite it worked on the first install ok. So I am stomped! Do you have a PC that you can use?
Yes i have got pc. ฤฐ tried on my phone (xiaomi redmi note 12 pro). But i had the same problem.
Go this web page and download R+Design for PC
https://en.robotis.com/service/downloadpage.php?ca_id=10
It should work.
i need android version. 
My S6 Lite is on Android 13. but I also have a Samsung Galaxy A05s on Android 14 and I just installed R+m.Design on the A05s, and I had no problems at all. So I donโt know what else to tell you! 