Citrix configuration issues on Linux

I have to use Citrix Workspace to launch a remote VM on my devices Windows and Linux. Unfortunately, I have some difficulties with starting VMs on Linux devices. I collected troubleshooting guides that help to configure the Citrix Workspace App on Ubuntu and Raspbian distributives. All of these environments have problems with certificates.

The error message "unknown error 1000119 verify your connection settings and try again" means that you need to update certificates of Workspace application.
You have to remove cacerts and link to /etc/ssl/certs by the following commands:
cd /opt/Citrix/ICAClient/keystore/
sudo rm -rf cacerts
sudo ln -s /etc/ssl/certs cacerts  
Taken from here

The error message "USERTrust RSA Certificate Authority SSL error 61" means that you have to share the certificate of the host used for connection with your Citrix installation. Because the application can not connect to the https resource due to the lack of the required certificates.
To fix this issue the user should follow this guideline.
(copy the certificate file to /opt/Citrix/ICAClient/keystore/cacerts and then execute command /opt/Citrix/ICAClient/util/ctx_rehash)

The dialog box for exporting the host certificate

Context menu to access the data of the host certificate