Because of the dmesg-error-Message  [    9.557455] cfg80211: loaded regulatory.db is malformed or signature is missing/invalid I rechecked the regulatory.db and did found 2 more files to install  1.) new pem-certificate ( sforshee.key.pub.pem <-- for signature ) 2.) new regulatory.bin   In the archive  http://ftp.be.debian.org/pub/software/network/wireless-regdb/wireless-regdb-2019.03.01.tar.gz or at https://git.kernel.org/pub/scm/linux/kernel/git/sforshee
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