Hi,
on an AWS server I get this error:
$ modprobe batman-adv $ dmesg ... [ 1310.125438] batman_adv: Unknown symbol cfg80211_get_station (err 0)
$ uname -a Linux ip-172-31-47-217 4.15.0-1032-aws #34-Ubuntu SMP Thu Jan 17 15:18:09 UTC 2019 x86_64 x86_64 x86_64 GNU/Linux