@George I checked on OpenCollective and you are not part of any tier. You must be part of the Release Testers, Beta Testers, or Crew tiers, which are monthly contribution tiers. Thus you won't receive the emails.
@Lucien_Lachance You were manually added then it marked you as a backer. Moving you to Crew tier and will send you the email manually via the test system. Credentials haven't changed though.