Hi,
I’m on my phone now, but I saw your other post and I think that one of your problems is that you’re scheduling your api workflow on a list but you are not giving time between each operation.
Try setting 5 seconds between each of them.
If it works then you can see your server use and see if you can set 3 seconds or more)
How much items have this list?
Also, if it contains more than 100 rows, I recommend you to use a recursive api workflow instead of the schedule api workflow on a list. It is more reliable.
Hope it helps,
Juan