Problem with certificate


i have problem with my certificate. I created a new key and then generated a new certificate for it through the functions: certificate export.
the certificate has been imported from my partner.

when the file is sent, the following message appears: "A problem occured during processing a send order: [IllegalArgumentException] "null alias passed to getCertificate." - the data has not been transmitted to the partner."

how can this be fixed?



I thought that this was about Mendelssohn the musician. Music can be really therapeutic and I have read enough about time 4 writing and how these are all interrelated. People will keep writing about music. They will pay people to write about it and there will be more to read about this in the future. I will not stop with just one subject. I am going to read everything. I have plenty of time and you all know I wouldn't mind reading and rewriting everything again to include anything for improvement.