Login Issues

Hi,
I have 3 websites all based on wordpress with the same theme etc. they have the same name just finish with different end (.com, .ie, .eu).
Each website has its own login and password.

When I try to login to the .com and .eu login fails and ‘Back to website name’ redirects me to .ie website. Only .ie login works and allows me access to dashboard.

I have recently updated .ie and have no idea why I can’t login to other 2. Any idea how to fix the issue so that I can login again to .com and .eu?

Thank you