If a user's full name in their Atlassian account contains characters from non-latin alphabets (e.g. 'ö', their invitations to other users do not get sent.
- Edit your Full Name in your Atlassian account to include a character from a non-latin alphabet (e.g. ö)
- Go to a repo of yours in Bitbucket >> Settings >> User and group access
- In 'Users', type an email to invite (that has no Bitbucket account yet)
The email entered in step # 3 above gets an invitation
No invitation is sent to that email.
In Chrome, if you open 'Developer Tools' >> 'Console', you will see a 500 error