Hi,
I am unable to create new theme in SCP, using UI theme designer service.
I am getting this error:

I have followed these URL for help:
1. https://help.sap.com/doc/49a891407a0f48a08e24d5851ea90906/Cloud/en-US/UACP-UIThemeDesigner.pdf
2. https://blogs.sap.com/2017/12/18/step-by-step-styling-using-theme-designer-in-sap-cloud-platform/
3. https://launchpad.support.sap.com/#/notes/0002466020
Please guide me on how to create theme successfully.
Thanks,
Saurabh.