while creating the new user i wasn't able to create it as it is showing like this after clicking on save.
and also while creating in the user license iam unable to select the salesforce platform as it is not showing in the list and also in profile
#Trailhead Challenges
,
The license salesforce platform might be allocated and is exhausted.
Please deactivate any user with salesforce platform license and then try to create a new user. You can find the license available.
Thanks