Issue SSL CERTIFICATE ISSUES

[Zicane]

Hi, I bought a SSL certificate from a provider and it gave me 5 files:
examplekey.pem
examplecer.pem
example.pkcs7
example.cer
domain.crt
But when I upload the files (domain.crt and examplekey.pem) in this section:

Plesk gives me back this error:



I tried to upload it as text, but it gives me the same error.
Please HELP!!