While this doesn't answer the question directly, I hope this provides an additional solution that I find gets towards the goal of creating a task from an email.
You can go to the tool icon in any project on Todoist and get an email specific to that project - including the inbox. When you send email to that address, a task is created in Todoist with the title of the subject, and you can embed labels, date, etc. in the subject as well.
There are pluses and minuses to it. The main minus is that you're not linking the actual email, so there isn't the direct connection that there is with the gmail extension. It's also slightly more work than the gmail plugin in that you have to take the message you want to make a task of, and forward it to that email address, and you don't have the ability to customize the task very much within Google inbox - ie you need to manually type out label names in the subject, if you want to specify a different project than the inbox you would need to find addresses for all your projects and set them up as contacts in Google, etc.
On the plus side, the text of the email gets embedded into a comment attached to your task, so in some ways it makes the link unecessary, since, at least for me, I used the link in many cases just to see the details of the email. This is of course not useful if the task is to email the person back, where having a direct link to the original email would of course be optimal. And the attachment often needs editing because Todoist doesn't format html email in a message and also gives you all the email headers, etc., so yet again, a bit more work if you want to have a clean and easy to read attachment.
The way I set it up is to create a contact called "Todoist Inbox" so I can quickly press "F" then "Todo..." and it will come up. It works well, and what I find I can do is if it's something that I might need the original email again, I can snooz it and thus I have a task that has a secondary "reminder" by coming back to my inbox and I can then either archive permanently or go back to look at the task I know I created (since it shows it was forwarded to my Todoist Inbox) - check to see I've done it if I don't recall what it was about, etc.