thiserror | derive for struct and enum error types | SDK library

This is my first attempt to using thiserror in Rust. One of the error types I want to provide is a general string which has a message but no other fields. I've attempted to copy this from the thiserror docs, with the only exception being the use of #[from], so that I can simply return Err(String::from("some string")). The code looks like this:

I'm trying to compile my Rust code on my M1 Mac for a x86_64 target with linux. I use Docker to achieve that.

My Dockerfile:

I am getting permission denied when trying to run a small rust cli app via a docker container. I can build the image fine, but when I try to run it I get:

I have an application that extends over 3 crates: A crate that holds the abstract framework, another that holds one of a number of plugins selected as a cargo feature, and a third that contains a concrete implementation.

The problem is that the plugin determines the "Version" type throughout the application, and the implementation determines the Errors type throughout the application. To make the application plug-able across multiple plug-ins and across multiple implementations, I need the Errors type in the plugin to be generic, and I can't figure out how to do that.

In the minimal code below, I have hard coded the Plugin type Errors = MyThingErrors to show something that works. But I need the type of Errors here to be generic, not concrete. I've tried all sorts of combinations of generic parameters, but can't get it to compile.

So, is there a trick? Am I pushing Rust generics too far? Is this a Problem XY example, Perhaps I should follow a different approach?

Any suggestions gratefully received.

Here is the working example:

I want to port in serde_json through cucumber. gherkin_rust v0.10.1 lists it under "[build-dependencies]". How do I access it without adding it to the toml file / using an extern crate call?

I'm learning the rust language. So, I try to build a simple web app using sqlite3. But it gets multiple packages link error.
I saw some solution for this error(ex. this), but they didn't work.
The cause seems to be that the version specification of rusqlite is wrong, but I don't know the correct version specification.
How should I configure the cargo.toml?

Source codes are here.
cargo.toml

I have dummy code that reads a json file and creates a vector of the items. For debugging purposes I'd like to print this to console. However I'm faced with cannot be formatted with the default formatter

I have tried using {:?} with no luck

I am using the thiserror crate to create a custom error type

I am writing a TUI app in rust to manage some game servers. The application itself works fine but the main.rs file is now over 1k lines so I decided to split it into multiple files to make it easier to work with. Each of the files needs to be able to access the structs and functions in the other files. The split files have the following structure.