I keep running through this issue with v.s 2019 iOS app on Xcode

Question

I keep receiving this error message. :

Showing Recent Messages Ld /Volumes/G-DRIVE\ mobile\ SSD\ R-Series/V.Studios/hdehh/hdehh/obj/Xcode/0/DerivedData/hdehh/Build/Products/Debug-iphonesimulator/hdehh.app/hdehh normal (in target 'hdehh' from project 'hdehh') cd /Volumes/G-DRIVE\ mobile\ SSD\ R-Series/V.Studios/hdehh/hdehh/obj/Xcode/0 /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/clang -target arm64-apple-ios15.4-simulator -isysroot /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator15.5.sdk -L/Volumes/G-DRIVE\ mobile\ SSD\ R-Series/V.Studios/hdehh/hdehh/obj/Xcode/0/DerivedData/hdehh/Build/Products/Debug-iphonesimulator -F/Volumes/G-DRIVE\ mobile\ SSD\ R-Series/V.Studios/hdehh/hdehh/obj/Xcode/0/DerivedData/hdehh/Build/Products/Debug-iphonesimulator -filelist /Volumes/G-DRIVE\ mobile\ SSD\ R-Series/V.Studios/hdehh/hdehh/obj/Xcode/0/DerivedData/hdehh/Build/Intermediates.noindex/hdehh.build/Debug-iphonesimulator/hdehh.build/Objects-normal/arm64/hdehh.LinkFileList -Xlinker -rpath -Xlinker @executable_path/../Frameworks -dead_strip -Xlinker -object_path_lto -Xlinker /Volumes/G-DRIVE\ mobile\ SSD\ R-Series/V.Studios/hdehh/hdehh/obj/Xcode/0/DerivedData/hdehh/Build/Intermediates.noindex/hdehh.build/Debug-iphonesimulator/hdehh.build/Objects-normal/arm64/hdehh_lto.o -Xlinker -export_dynamic -Xlinker -no_deduplicate -Xlinker -objc_abi_version -Xlinker 2 -fobjc-arc -fobjc-link-runtime -Xlinker -sectcreate -Xlinker __TEXT -Xlinker __entitlements -Xlinker /Volumes/G-DRIVE\ mobile\ SSD\ R-Series/V.Studios/hdehh/hdehh/obj/Xcode/0/DerivedData/hdehh/Build/Intermediates.noindex/hdehh.build/Debug-iphonesimulator/hdehh.build/hdehh.app-Simulated.xcent -framework UIKit -framework MapKit -framework Foundation -framework CoreGraphics -Xlinker -no_adhoc_codesign -Xlinker -dependency_info -Xlinker /Volumes/G-DRIVE\ mobile\ SSD\ R-Series/V.Studios/hdehh/hdehh/obj/Xcode/0/DerivedData/hdehh/Build/Intermediates.noindex/hdehh.build/Debug-iphonesimulator/hdehh.build/Objects-normal/arm64/hdehh_dependency_info.dat -o /Volumes/G-DRIVE\ mobile\ SSD\ R-Series/V.Studios/hdehh/hdehh/obj/Xcode/0/DerivedData/hdehh/Build/Products/Debug-iphonesimulator/hdehh.app/hdehh

ld: entry point (_main) undefined. for architecture arm64 clang: error: linker command failed with exit code 1 (use -v to see invocation)