If you're running your node from 2017 on, it could also simply be that there's no space left on the storage device. Do you operate a full or a pruned node? How much free space is on the device that stores your Bitcoin Core files? Running out of space should produce some other
debug.log entries, though than this port mapping issue.
I'm not sure if
AddPortMapping(8333, 8333, XXX.XXX.X.XXX) failed with code 718 (ConflictInMappingEntry)
is the terminating error, even when it shows up multiple times in your
debug.log file.
What is written as fatal error indication in your
debug.log when Bitcoin Core terminates?
Hello and thanks for your answer, sorry for not being able to answer sooner to all of you :
- yes I run a full node since 2017 on a 904 Go harddrive, I still have 27 Go a freespace...