If I have a get accessor set within a namespace like so the output lua file tries to call __TS__FunctionCall without a function declaration existing. I have made an example in this playground here:

https://typescripttolua.github.io/play/#code/KYDwDg9gTgLgBAYwDYEMDOa4FkIBNhJxwDeAUEUWFAJYBuKMwcASigHa4QC2AcgK5cARsCgAuOGwHCocALxwADAG5S5CgHNg8fkJEAKAJTjJumWQoW4ULXyhs4MABbU0AOlYduO6SosBfUgCgA