Business Central: Cannot publish...error about missing serverInstance..

Hello,

Trying to publish an extension but getting error that serverInstance cannot be blank when I have in fact a value for it in the launch.json.

Here's what it looks like:

"version": "0.2.0",
"configurations": [

{
"type": "al",
"request": "launch",
"name": "Testing Customizations",
"server": "http://xxxxservernamexxxx",
//**************DEV********
"serverInstance": "xxx2019_DEV",
"port" : 7069, //DEV Development tab
"authentication": "Windows",
"startupObjectId": 22,
"startupObjectType": "Page",
"breakOnError": true
}

Any idea?