Unacceptable TLS Certificate

With the Citrix Workspace App for Linux 1906 and above, if you are using a SAML store with AuthV3, a blank window with “Unacceptable TLS Certificate” error might appear before the logon prompt. This issue also appears if you run Fiddler with the Citrix Workspace App. This is an expected behavior because of Webkit migration from version 1 to 2. according tohttps://raspberrypi.stackexchange.com/questions/76419/entrusted-certificates-installation

Create a local cert directory:

mkdir /usr/share/ca-certificates/local

Download the CA cert:

cd /usr/share/ca-certificates/local
wget https://entrust.com/root-certificates/entrust_l1k.cer

Reformat the certificate into PEM:

openssl x509 -inform PEM  -in ******.pem -outform PEM -out *****.pem

Reconfigure the ca-certificates package:

dpkg-reconfigure ca-certificates downloaded and added certificates https://www.certum.pl/pl/upload_module/wysiwyg/certyfikaty/Certum-Trusted-Network-CA%20-2.pem https://repository.certum.pl/dvcasha2.pemhttps://letsencrypt.org/certs/lets-encrypt-r3.pem Reboot.

openssl x509 -inform PEM  -in ******.pem -outform PEM -out *****.crt