How to find the error source for Facebook GraphApi?

Question

Facebook

Earlier, the name of the API method was written in the statistics, the call of which ended in an error, I corrected everything. But lately, there are about 150-200 errors per day (about 0.8% of all calls) without specifying the source. It seems to be not scary, but I would like to figure it out, or at least understand where to dig. From those errors that I get logs, there are about 7-10 of them per day.
Maybe someone knows where to dig, or is this generally considered a normal level of errors, for example, due to problems with the network and players, and there is no point in panicking.