After updating to the newest version 2.6.2, our SSH credentials stopped working in jobs.

We use them:

• For the SSH Agent, which now fails with this exception:

FATAL: [ssh-agent] Could not find specified credentials
java.io.IOException: [ssh-agent] Could not find specified credentials
	at com.cloudbees.jenkins.plugins.sshagent.SSHAgentBuildWrapper.preCheckout(SSHAgentBuildWrapper.java:209)

• To connect to our SCM via Git plugin, which only logs a warning, but still works:

Warning: CredentialId "a151f039-3970-4572-95d0-f24def5e9896" could not be found.

In the dropdown menu of both plugins, no credential is selectable. We also have "Secret text" and "username and password" types in the global domain, so the problem seems to not only be limited to SSH.

These behaviours could be fixed by reverting the plugin to version 2.6.1.