linker command failed with exit code 1 (use -v to see invocation)

----------------------------------------

LinkDylibError: Failed to build ListOfPosts.swift

Linking failed: linker command failed with exit code 1 (use -v to see invocation)

ld: warning: directory not found for option '-F/Applications/Xcode-beta.app/Contents/SharedFrameworks-iphonesimulator'
Undefined symbols for architecture x86_64:
  "nominal type descriptor for Parser.XMLPost", referenced from:
      _symbolic _____ySay_____SgG_G 7Combine9PublishedV9PublisherV 6Parser7XMLPostV in ListOfPosts.2.preview-thunk.o
      _symbolic Say_____SgGIegg_ 6Parser7XMLPostV in ListOfPosts.2.preview-thunk.o
      _symbolic _____Sg 6Parser7XMLPostV in ListOfPosts.2.preview-thunk.o
      _symbolic Say_____G 6Parser7XMLPostV in ListOfPosts.2.preview-thunk.o
  "type metadata for Parser.XMLPost", referenced from:
      closure #1 ([Parser.XMLPost?]) -> () in (extension in Posts_PreviewReplacement_ListOfPosts_2):Posts.API.(__preview__getPosts in _97471E6379C7E6DD7E2173C2B0522D79)() -> [Posts.Post] in ListOfPosts.2.preview-thunk.o
  "Parser.Parser.$posts.getter : Combine.Published<[Parser.XMLPost?]>.Publisher", referenced from:
      (extension in Posts_PreviewReplacement_ListOfPosts_2):Posts.API.(__preview__getPosts in _97471E6379C7E6DD7E2173C2B0522D79)() -> [Posts.Post] in ListOfPosts.2.preview-thunk.o
  "Parser.Parser.parseMock(Swift.String?) -> ()", referenced from:
      (extension in Posts_PreviewReplacement_ListOfPosts_2):Posts.API.(__preview__getPosts in _97471E6379C7E6DD7E2173C2B0522D79)() -> [Posts.Post] in ListOfPosts.2.preview-thunk.o
     (maybe you meant: default argument 0 of Parser.Parser.parseMock(Swift.String?) -> ())
  "Parser.Parser.__allocating_init() -> Parser.Parser", referenced from:
      (extension in Posts_PreviewReplacement_ListOfPosts_2):Posts.API.(__preview__getPosts in _97471E6379C7E6DD7E2173C2B0522D79)() -> [Posts.Post] in ListOfPosts.2.preview-thunk.o
  "type metadata accessor for Parser.Parser", referenced from:
      (extension in Posts_PreviewReplacement_ListOfPosts_2):Posts.API.(__preview__getPosts in _97471E6379C7E6DD7E2173C2B0522D79)() -> [Posts.Post] in ListOfPosts.2.preview-thunk.o
ld: symbol(s) not found for architecture x86_64
clang: error: linker command failed with exit code 1 (use -v to see invocation)