IIS Express reserves a limited number of ports for automatic SSL binding
SSL ports are restricted to 44300-44399

after changing ports you might need to:
right click IIS express -> show all applications -> select an item -> click the applicationhost.config file path
delete bindings from the file, stop all IIS sites, and re-open VS Code

44320 SNGC.Dash
44321 SNGC.Auth
44322 SNGC.Counterparty
44323 SNGC.Data
44324 SNGC.Jobs
44325 SNGC.Market
44326 SNGC.Midstream
44327 SNGC.Report
44328 SNGC.Scheduling
44329 SNGC.Security
44330 SNGC.Deal
44331 SNGC.Accounting
44332 SNGC.Invoicing

44399 SNGC.NewModule
