When you fail to share devices, you will see the error as in the screenshot below.
As in the picture, you will get the 'Failed to share. Please try again.' error.
If trying again does not work, please follow the steps below to troubleshoot.
1. Check if you have selected the correct country and entered the correct account.
2. Your account is in a different server than the receiver's.
If the receiver's account is correct yet it fails again, it is possible that the receiver's account is in a
different server than yours. In this case, you will need to submit a ticket in eWeLink app to check whose
account was created in a wrong server and then follow the intructions of eWeLink to delete the account of the wrong server.
*Note that you can not tell the server by the account's country, for it is decided by IP address instead. Sometimes, vpn or other network services which hide or changes your IP address will cause such error, too.