Roles.findUsersInRole(...).toArray is not a function when registering new user

Description:

After inviting new users through their email adress, when they register a new account they get the error 'Roles.findUsersInRole(...).toArray is not a function'

Steps to reproduce:

1. go to adminstration/users/invite, send a registration email
2. let the user register themselves using the link provided in the registration email
   3.User fills in all fields, receives the error and cannot proceed

Expected behavior:

User should be registered after filling in their details

Actual behavior:

Roles.findUsersInRole(...).toArray in a red textbox in upper right corner

Server Setup Information:

• Version of Rocket.Chat Server: docker image rocket.chat:4.2.0
• Operating System: Linux red hat
• Deployment Method: docker
• Number of Running Instances: 1
• DB Replicaset Oplog: docker mongo:4.4 ?
• NodeJS Version:
• MongoDB Version: mongo:4.4

Client Setup Information

• Desktop App or Browser Version: Chrome
• Operating System: Windows 10

Additional context

using docker image rocket.chat:4.1.2 resolves the issue

Relevant logs:

running 4.1.2 now, can reproduce if required.

Start by reproducing the invited-user registration flow described in the issue on Rocket.Chat 4.2.0, then compare it with 4.1.2, where the reporter says the problem does not occur. Done means an invited user can complete registration without the Roles.findUsersInRole(...).toArray error.