Server refused connection (wrong security type?) - Launch Web Sessions via SPP / SRA - Experiences?

Hello together,

we are experiencing the error message sporadically.

"Server refused connection (wrong security type?)" when launching Safeguard Remote Acces Web Sessions via SPP directly. This usually always resolves when closing the faulty tab and just trying again. It eventually works out after 2-5x tries

It only affects Windows Servers, not Linux.

Has anyone ever seen this problem? Our environment is running on-premises in a cluster of SPP + SPS machines.

...