cargo build --release error

[zzz6519003]

error[E0463]: can't find crate for core
|
= note: the wasm32-unknown-unknown target may not be installed
= help: consider downloading the target with rustup target add wasm32-unknown-unknown

error[E0463]: can't find crate for compiler_builtins

For more information about this error, try rustc --explain E0463.
error: could not compile cfg-if (lib) due to 2 previous errors
warning: build failed, waiting for other jobs to finish...
error: cargo command run failed: exit status: 101

IF I RUN AGRAIN, I GET:

  | ------------------------ in this macro invocation
  |
  = note: this error originates in the macro `impl_trait_array` (in Nightly builds, run with -Z macro-backtrace for more info)

error[E0425]: cannot find function, tuple struct or tuple variant Ok in this scope
--> /Users/mac/.cargo/registry/src/index.crates.io-6f17d22bba15001f/byte-slice-cast-1.2.2/src/lib.rs:274:25
|
274 | Ok(slice::from_raw_parts(slice.as_ptr() as *const [$to; N], len))
| ^^ not found in this scope
...
516 | impl_trait_array!(isize);
| ------------------------ in this macro invocation
|
= note: this error originates in the macro impl_trait_array (in Nightly builds, run with -Z macro-backtrace for more info)

error[E0425]: cannot find function, tuple struct or tuple variant Ok in this scope
--> /Users/mac/.cargo/registry/src/index.crates.io-6f17d22bba15001f/byte-slice-cast-1.2.2/src/lib.rs:287:21
|
287 | Ok(&mut [])
| ^^ not found in this scope
...
516 | impl_trait_array!(isize);
| ------------------------ in this macro invocation
|
= note: this error originates in the macro impl_trait_array (in Nightly builds, run with -Z macro-backtrace for more info)

error[E0425]: cannot find function, tuple struct or tuple variant Ok in this scope
--> /Users/mac/.cargo/registry/src/index.crates.io-6f17d22bba15001f/byte-slice-cast-1.2.2/src/lib.rs:291:25
|
291 | Ok(slice::from_raw_parts_mut(slice.as_mut_ptr() as *mut [$to; N], len))
| ^^ not found in this scope
...
516 | impl_trait_array!(isize);
| ------------------------ in this macro invocation
|
= note: this error originates in the macro impl_trait_array (in Nightly builds, run with -Z macro-backtrace for more info)

Some errors have detailed explanations: E0405, E0412, E0425, E0463.
error: could not compile byte-slice-cast (lib) due to 470 previous errors
error: cargo command run failed: exit status: 101