Hello,
From your attachment I guess the certificate name is HR_Portal.p12 right ? you might want to renew the certificate with the following commands, apply them on the Central Manager, they should extend the cetificate for 5 years.
WAE#crypto generate self-signed-cert HR_Portal.p12 rsa modulus 1024
WAE(config)# crypto ssl services global-settings machine-cert-key HR_Portal.p12
if the alarm does not clear you will need to contact the admin who create the SSL service on your WAAS central manager.
any questions let me know
good luck!