Please post the output of:
$ hcxpcaptool -V hcxdump.pcapng
output (from hcxdumptool and hcxpcaptool) should look like this one here:
https://hashcat.net/forum/thread-6661-po...l#pid42993
$ hcxpcaptool -V hcxdump.pcapng
output (from hcxdumptool and hcxpcaptool) should look like this one here:
https://hashcat.net/forum/thread-6661-po...l#pid42993