Can't invite new users

**Describe the bug**
When I try to add a new user to my existing organization, the new user cannot set there password. Opening invite link will redirect the user to the login page.
Also the invite link on the web ui is wrong, it adds an additional slash after the server address:
http://192.168.23.11:5000//Invite/?id=...

**To Reproduce**
Steps to reproduce the behavior:
1. Go to Organization
2. Add new user
3. Open the invite link in incognito mode / another browser
4. Login page opens

**Remotely Version**
Server: 2022.08.02.0428 according the about page, but I ran the latest docker image (build20220917072609)

**Expected Behavior**
The user should be able to add a password to there account.

**Desktop (please complete the following information):**
- OS: Ubuntu
- Browser: Chrome
- Version: 106

Start by reproducing the Organization invitation flow described in the issue, using the generated invite link in another browser or incognito mode. Inspect how the web UI builds the link and how the invite route handles password setup; done means the link has one slash after the server address and opens password creation instead of the login page.

Written by the indexing model from the issue text.