I tried again after logout and log back in but it’s still the same. Same goes in another browser.
I noticed I enter the -----BEGIN PRIVATE KEY----- inthe private key text area while in the info tooltip I am asked to enter the -----BEGIN RSA PRIVATE KEY-----
This file is README.txt
Your certificate file is mydomain_2021-06-15.crt
Your intermediate certificate file is ca_bundle.crt
Your certificate private key file is mydomain_2021-06-15.key
Your certificate private key file is mydomain_2021-06-15.protected.key (password protected key, incompatible with some hosters)
Your private key passphrase is in passphrase.txt
Your certificate file for Windows is mydomain_2021-06-15_windows.pfx (Import password is in passphrase.txt )
I’m using Let’s Encrypt to get a cert for my org and my key looks the same as yours but I’m not experiencing this issue. Provided these are PEMs and you are providing the complete key/cert when prompted, with no trailing/leading whitespace, I don’t see what the problem could be.
To get further assistance on this, you may want to open a support case so a member of our Support team can check our logs to see what is causing this issue.