Dear HenkSnel,
Please check the Environment Requirements of Ultrapath 21.5 installation.
Run the cmd command to open the CLI. Run the upadm check status command to check whether UltraPath takes effect.
If Checking environment and config in the command output does not pass the check, check whether UltraPath is installed as instructed in Installing UltraPath for Windows. If the check still fails, UltraPath does not take effect or the environment is abnormal. In this case, contact Huawei technical support.
Thanks.