Please compile oscam with the patch below and report the result whether "Wrong OTP/OTA CSC values" error has gone. Please be reminded that CAID 187D need CWPK0 through CWPK16 to be configured on webif. If you don't know those values, you can try to input random fake values. You all should have seen "found" after implementing this patch.
https://git.streamboard.tv/common/oscam/-/merge_requests/47.patch
https://git.streamboard.tv/common/oscam/-/merge_requests/47.patch