Failed to install Collabora-online on my own server

Hii @STORM i see your private key and cert does not match that seems to be issue here As per logs

The private key must match with the certificate('s public key) you use. Otherwise, you won’t be able to use them together.

One way to make sure both key and certificate match (certificate comes from the private key being used) is by checking their modulus with openssl.

openssl rsa -in file.key -noout -modulus

openssl x509 -in file.crt -noout -modulus

Note: If certificate or key are not in ASCII you must add "-inform DER" to the specific file.

Also I found a thread which have some interesting discussion related to fix issue ssl - Error: Public Key Certificate and Private Key doesn't match - Stack Overflow