Hi, I think you are new to sololearn. So,welcome to sololearn and please follow the guidelines/rules :
So, DO NOT POST repeated questions.
It can be some kind of bug. Use the "SEARCH BAR" before posting your questions.
It is not like that. He is at low level that's why he can't send message to anyone. He needs to increase his level. No need to reinstall the app. In 3 years of Sololearn journey I never reinstalled Sololearn and everything works fine.