Hi, please why the variables in Postman not working? I set the variable {{baseUrl}} as a global variable, to collection and also to the environment, to initial and current value (6 times). But nothing working. The popup showing the value but the request is called with variable name instead of the correct value. Please can you help me?
@jan: Welcome to the community 
Why do you want to define the variable in global, collection and environment level?
Is it all with the same name? Please define the variables based on the usage.
This link has enough details about variables.
Kindly clear all the variables and try once again, if still having issues, please share us the details.
Check if you have the variable set anywhere, ie. in the collection, folder, etc. I had the same issue, that i set the variable in the Global area but it was not pulling in the value. I found I had set it at the Collection level but it was blank; when I deleted it, the Global worked as expected.