Hi @JUN LIANG ZHANG , thanks for replying back.
Can you please expand tables to know if the tables exist there as mentioned in below screenshot:
It should show something like below:
If these tables are not there, that means some problem while creating the database.
I went through the article, can you please check if you have selected the option 'sample' while creating the database as highlighted in below screenshot. By default this option is not selected so you have to manually select this.
If not, then you need to recreate the database and keep the 'sample' option selected and then try again.
Please let me know if this helps or else we can discuss further.
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