Trouble with json serializing in tauri command

[pan-grayza]

In rust I have this command:

#[tauri::command]
pub fn remove_network(app: AppHandle, network_name: String) -> Result<String, FileError> {
   // Logic
    Ok("Network removed successfully".to_string())
}

And on frontend I got this function:

async function remove_network(networkName: string) {
    await invoke('remove_network', { networkName })
}

And for some reason I am getting this error on frontend:

Uncaught (in promise) failed serialize json json

Which is weird because I have identical invoke for almost identical command that works fine:

async function unlink_directory(pathName: string) {
    await invoke('unlink_directory', { pathName })
}

#[tauri::command]
pub fn unlink_directory(app: AppHandle, path_name: String) -> Result<String, FileError> {
    // Logic
    Ok("Directory unlinked successfully".to_string())
}

Update:

I tried a lot of stuff, but still Im getting error specifically on this command
Stuff I tried:
-renaming argument
-cargo clean
-adding other arguments
-removing this command -> compiling -> re-adding command -> compiling

[FabianLars]

• Does networkName contain special chars? Or, did you try simple dummy values?
• Does the command actually return the Ok() or does it return an error from whatever // logic contains?
• Is that the exact error you're getting? Doesn't sound like something tauri would throw.

[pan-grayza]

@tripp (not sure what his nickname on github is) helped me solve this issue on discord. The problem was that I was getting wrong json value because I forgot to change it after I copy paste it from other function. Suprisingly, even though error was on backend I was getting error on frontend, but after some debugging and improved error handling (replace all ? with .unwrap()) I got panic from rust that told me what was wrong