Hello @ranjithc26,
as already mentioned by @ganncamp, we don’t fully support Swift 5.9 yet.
These are some of the features of Swift 5.9 not yet supported in our analyzer:
- Macros
- Parameter packs
- Variadic generics
If any of those are used in your code, it’s (sadly) expected that you are getting parsing errors. Otherwise, if you could please send me a private message with the file we could investigate further.
In any case, we have already planned a sprint in the coming months to complete the implementation of those missing features, so stay tuned for more 
Thanks!
Victor