Not sure if it belongs here, but thought I could receive more input on it.
Appears across multiple kernel versions and couldn't find much.
Referring to nvm.c, and tested on an Intel Wireless-AC 9260, asserts that iwlwifi is unable to parse regulatory information in the nvm_file. This also occurs after setting the region with "iw reg set" and defining the correct region in /etc/default/crda. Results in "Can't parse empty family 8000 OTP/NVM sections."
dmesg | grep -i iwlwifi
[ 6.833956] iwlwifi 0000:3a:00.0: enabling device (0000 -> 0002)
[ 6.848589] iwlwifi 0000:3a:00.0: WRT: Overriding region id 0
[ 6.848591] iwlwifi 0000:3a:00.0: WRT: Overriding region id 1
[ 6.848592] iwlwifi 0000:3a:00.0: WRT: Overriding region id 2
[ 6.848593] iwlwifi 0000:3a:00.0: WRT: Overriding region id 3
[ 6.848594] iwlwifi 0000:3a:00.0: WRT: Overriding region id 4
[ 6.848595] iwlwifi 0000:3a:00.0: WRT: Overriding region id 6
[ 6.848596] iwlwifi 0000:3a:00.0: WRT: Overriding region id 8
[ 6.848598] iwlwifi 0000:3a:00.0: WRT: Overriding region id 9
[ 6.848599] iwlwifi 0000:3a:00.0: WRT: Overriding region id 10
[ 6.848600] iwlwifi 0000:3a:00.0: WRT: Overriding region id 11
[ 6.848601] iwlwifi 0000:3a:00.0: WRT: Overriding region id 15
[ 6.848602] iwlwifi 0000:3a:00.0: WRT: Overriding region id 16
[ 6.848603] iwlwifi 0000:3a:00.0: WRT: Overriding region id 18
[ 6.848605] iwlwifi 0000:3a:00.0: WRT: Overriding region id 19
[ 6.848606] iwlwifi 0000:3a:00.0: WRT: Overriding region id 20
[ 6.848607] iwlwifi 0000:3a:00.0: WRT: Overriding region id 21
[ 6.848608] iwlwifi 0000:3a:00.0: WRT: Overriding region id 28
[ 6.848943] iwlwifi 0000:3a:00.0: loaded firmware version 46.6f9f215c.0 9260-th-b0-jf-b0-46.ucode op_mode iwlmvm
[ 6.848971] iwlwifi 0000:3a:00.0: Direct firmware load for iwl-debug-yoyo.bin failed with error -2
[ 6.919148] iwlwifi 0000:3a:00.0: Detected Intel(R) Wireless-AC 9260 160MHz, REV=0x324
[ 6.967801] iwlwifi 0000:3a:00.0: Can't parse empty family 8000 OTP/NVM sections
[ 6.967806] iwlwifi 0000:3a:00.0: Failed to read NVM: -61
[ 6.981823] iwlwifi 0000:3a:00.0: Failed to run INIT ucode: -61