Show your blocks. It will be easier to help you.
Change Language , to understand blocks 
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Probably dataitem is not a list, it is a number. Check it.
You have 3 blocks that can be the culprit. It is one of the “Select list item” blocks with either an index of 5 or it could be the block with the variable “position” as an index. Make sure that the list your are selecting from has at atleast 5 items in it if your index is 5.
Most probably start value is empty. Use Do it on start value t debug your blocks and post a screenshot of result
which block should I change
I had a similar error. I solved it by putting result blocks in hours. during initialization, a request was sent, but the result was deliberately delayed by 3 seconds. as a result, the clock block, and the error disappeared
If I give you the aia file can you take a look?
I don’t know if I can help you. I offered you a solution that helped me. I don’t know if it will help you. this is the error I had
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thank you sır
I guess we can’t solve this problem
Post here or pm me your aia
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ı sent you now
have you seen my message dora paz?
I guess nobody cares
Read your error…
From post 1, it is very clear that yu are trying to take certain item from argument instead of list…
Make sure the values are in list
What can I do for it can you help me
Show us your database structure, full blocks si that we coukd assist you. Showing only error and excepting to solve issue is useless
Here no one is perfect in mind reader
Pls show us all so we tell you whare is the problem