Hi dear,
In the images you posted, there aren’t any blocks related to Firebase. How are you retrieving the values?
The function I suggested was working perfectly, as we confirmed in the topic where we created it.
But it was designed for a columns width of 28%, so if you need to add more fields, it becomes a problem.
However, I had advised you not to modify it 
Here, I simply think you called the function twice with the same indexes, and as a result, it recreates the components with the same name, causing an error.
Anyway, I recommend using an extension to create the table, there are really many available out there.
I followed your idea of creating it dynamically because it seemed like a nice concept and allowed for a lot of customization, but if you just need to create a simple table, don’t make things complicated, use an extension
Search on this very useful page created by Taifun.
To find them, press CTRL+F and type “Table”