Yes, in no_std or WASM you have to define a time provider. You can find an example here: https://github.com/shadowylab/universal-time#with-no_std-or-wasm-unknown
The example just set a fake time, in ...
I already do that, but it still require define_time_provider!
You can check the file here: https://git.reya.su/reya/coop/src/commit/fd32b8c0ce2348c046d7e458ce292270a6118260/web/src/main.rs
You can check the file here: https://git.reya.su/reya/coop/src/commit/fd32b8c0ce2348c046d7e458ce292270a6118260/web/src/main.rs