After remove the lines

"-framework",
"\"Reachability\""

of OTHER_LDFLAGS on ios/Runner.xcodeproj/project.pbxproj, now i'm able to run my project without problems.

if it doesnt work maybe you must also remove theReachabilitySwift line on HEADER_SEARCH_PATHS at the same file.

In my case, i use connectivity_plus package and it seems like it removed its dependency over reachability so its doesnt needed it anymore. Make sure you do that for all your schemas