Hello,
on sending a U-data from device to server, the corresponding device data website (image attached) and also the LoRaWAN frames website fail.
The application server shows the following warning:
Dez 10 11:47:00 XXX chirpstack-application-server[20296]:
time=“2019-12-10T11:47:00+01:00” level=warning msg=“requested number of gateways does not match returned” ctx_id="" expected=12 returned=9
Does anybody know how to fix this?
Regards
The uplink was received by 12 gateways, but there are only 9 gateways known in the database 
It is a warning to let you know that data might be missing in your database, it doesn’t break anything.
That was the only suspicious log entry. So the question arise what else could be the problem 
Thank god is JS… Same time the page gets blank an error appears on the console:
TypeError: "First argument must be a string, Buffer, ArrayBuffer, Array, or array-like object."
u index.js:326
u index.js:142
from index.js:155
value JSONTree.js:48
React 11
value DeviceData.js:180
value DeviceStore.js:226
dispatchEvent robust-websocket.js:242
x robust-websocket.js:172
react-dom.production.min.js:4408
Websocket gets closed afterwards.
@brocaar Do you have any idea how the data object could be broken?
I’m not sure if / how this is related to the “requested number of gateways does not match returned” question?
Mandy and me are working on the same project. Her problem is my problem 
The original problem is the broken page on incoming data. The “requested number…” log entry is only a wrong guess on our side.
Problem is solved.
An “old” (aka loraserver) version of gateway bridge on one of the gateways causes the live log page to break. In that case the uplink id was null, maybe causing things to went wrong…
@brocaar: Not sure if this is a bug or just an incompatibility of versions.
Ah that explains, but please note that these are two independent issues and there is no relationship to the logged warning and the JS error. Anyway, please see: https://github.com/brocaar/chirpstack-application-server/issues/398.