Kindly try to capture a browser trace for troubleshooting while reproducing the issue and let me know once done.
If you are trying to create another directory/tenant from existing trial tenant, then this may not work. As due to reported security concern multiple directory creation on trail/test tenant has been stopped.
As a workaround you may purchase an Entra ID license and try multiple tenant creation. We will have a detailed documentation published soon.
Thanks,
Akshay Kaushik
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