Link in e-mail after personal access token creation leads to an HTTP 404 error

Issue Summary

There is an invalid link in the e-mail that a user receives after creating a personal access token.

This is reproducible on Data Center: (yes)

Steps to Reproduce

1. Create a personal access token
2. In the e-mail received shortly after, click the link in the footer titled "manage your personal access tokens"

Expected Results

A page is displayed to manage personal access tokens (which should be <BaseURL>/plugins/servlet/access-tokens/users/<username>/manage)

Actual Results

The URL <BaseURL>/plugins/servlet/access-tokens/ is opened and an HTTP 404 error is displayed, saying Could not find servlet for: /plugins/servlet/access-tokens. Alternatively an HTTP 400 error might be displayed, saying Bad Request.

Workaround

Manually navigate to the personal access token page:

1. Click the avatar in the top right
2. Select Manage account
3. On the left click HTTP access tokens