premailer | Preflight for HTML email | Email library

You have spring in your gemfile, usually hanging consoles and servers are related to that. The webrick gem was removed from the standard library in Ruby 3, so that's why it needs to be included in your Gemfile.

Re-add webrick to your Gemfile, do a bundle install, and then stop the background spring server with bin/spring stop. Then re-run the server.

Your best bet on solving issues with spring would be to head over and read about the gem on the GitHub project page, or opening a new question here on SO.

Hello @ahsan mukhtar you don't have to use any external library use django EmailMessage

The gist of this error is that the version of binary used to generate the code isn't compatible with the current version of code. A quick and easy solution would be to try updating the protoc-gen-go compiler and the gRPC library to the latest version.

go get -u github.com/golang/protobuf/protoc-gen-go

then regen the proto

heres a link to a reddit thread that discusses the issue

Changing the variable from message to msg worked. Seems like this variable is preserved for something else. I will keep this question here if someone else needs it in the future.

I think I see what's going on. In your Dockerfile, change your DB_URL from: mysql:// to mysql2://

You are loading the mysql2 gem, but indicating to ActiveRecord that you want to use a connection via the mysql gem.

This issue has been discussed over here and fixed here.

You should use these options as mentioned in this file.

This issue appears to be fixed in the just released 2.1.1 as per this GitHub issue:

Add support on fetching Uri with local filepath like "file:///C:/website/style.css"

It's required when we optimize the performance by fetching the local resource internally instead of making external web request towards internal resource. e.g. As I know the css is actually inside the local storage, it make sense to just make a fast local fetch ("file:///C:/website/style.css") instead of external web request ("https://www.example.com/style.css")

So I can now initialize a PreMailer instance with BaseUri "file:///" + new Uri(System.Web.Hosting.HostingEnvironment.MapPath("~/"), UriKind.Absolute)

It's how I boost the performance for my client, just share my code here.

The root of the problem seems to be bundler. What operating system and Ruby version are you using? It may be a problem with old OpenSSL library, so you can not install bundler and everything after it.

If you are using jRuby (your gem list output tells so), your problem seems to be the same as described in link. And there is a solution as well.

Maybe you forgot to set 2.1.2 version of ruby as global? (rbenv set global 2.1.2)

First, as ThorTL67 noted in the comments, it is a good idea to update your Rails version incrementally, not in one big leap. That way, your dependency issues will be less complex.

Check what version of Bundler you are using by running bundle version. If that version is old, it might be that some dependencies are not correctly calculated, and it might help to update Bundler (gem update bundler).

Then to the steps you can take to update from 4.2 to 'some higher version'. The list of errors that you got shows the conflicts between gem dependencies. You can try and tackle these conflicts one by one.