New BlazeMeter user invited to join a BlazeMeter account get an "Invalid username or password" error when they attempt to join the account after selecting the link in the email invitation to join the account:
Release : SAAS
Component : BLAZEMETER GENERAL PLATFORM ISSUE
A user account does not yet exist for the user causing the LOG IN error.
An invalid email id error will occur when a new user is invited to join a BlazeMeter Account if that user has not yet registered for a BlazeMeter User account. If Single Sign On (SSO) is not configured for the BlazeMeter account, then select the REGISTER option on the page and provide the required information to create the BlazeMeter User account and accept the invitation to join the Account from the email invitation: