Hostapd: nl80211

hi
i have error

13:26:19 	hostapd: 	nl80211: deinit ifname=blue0 disabled_11b_rates=0
13:26:19 	hostapd: 	hostapd_free_hapd_data: Interface blue0 wasn't started
13:26:19 	hostapd: 	blue0: AP-DISABLED
13:26:19 	hostapd: 	ACS: Failed to start
13:26:19 	hostapd: 	ACS: Possibly channel configuration is invalid, please report this along with your config file. 

i have this rule
HT Caps: [OFDM][BPSK][QPSK][DBPSK][DQPSK][16-QAM][64-QAM][256-QAM][HT20][HT40+][HT40-]
VHT Caps: [MAX-MPDU-7991][SHORT-GI-80]
I’m not on settings for ac
the gn works but it is necessary to force a channel
ty