`error: future cannot be sent between threads safely` when trying to build for `wasm32-unknown-unknown`

[setoelkahfi]

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I'm trying to include a crate successfully built with uiffi-rs for Swift for wasm. I created a new crate called crate-networking-wasm and referenced the base crate_networking. When running wasm-pack build in the crate-networking-wasm I got this error:

error: future cannot be sent between threads safely
  --> /path-to-repo/lib/crate_networking/src/content.rs:17:1
   |
17 | #[export(async_runtime = "tokio")]
   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ future created by async block is not `Send`
   |

Any pointers?

Related:

• https://github.com/mozilla/uniffi-rs/issues/1622
• https://github.com/mozilla/uniffi-rs/issues/2225