If you create a new scene in that project and add a new stored variable, do you see the error?
What if you do that in a different project? Is there still an error?
I’m trying to isolate the cause. So knowing the answers will be helpful. Because those internal errors often occur with different combinations of blocks but your video shows just a single block possibly causing the error.
Please try setting an app variable to the stored variable’s value. Then, use the app variable block as the row id. Let me know if that removes the error. It’s somewhat preferable to do this type of value transfer from stored variables anyway because stored variable blocks slow down an app much more than app variables do.
When I use stored variables, I try to only use those blocks when I am loading or saving a value. And when I load a variable (such as when screen opens), I immediately assign it to an app variable. When I’m only accessing a value, I use an app variable instead.