Attempting to access the users link in the Signup Admin Webapp fails

**Describe the bug**

**To Reproduce**
Steps to reproduce the behavior:
1. Go to Signup Admin Website, in the relative path: /Admin/Tenants, a table with tenants displays, and for each tenant the following links are available: Edit | Details | Users | Delete
2. When clicking the link `Users` the webpage redirects to /Admin/tenants//users
3. An error page displays:

```
Error.
An error occurred while processing your request.
```

**Expected behavior**
A page with a form to add the email should display, after clicking submit, a new user should display and a new record should be inserted in the database.

**Screenshots**

**Desktop (please complete the following information):**
- OS: Windows 11
- Browser: Chrome

**Additional context**
I saw the webpage to add an email once, when I put the email and click submit there was an error returned. Since then it failed every time.