I'm having the same issue and also the error "Handle is invalid" in Windows.
From what I've read it's a problem in Samba 4.12.2 and it has been fixed in the next version.
It would be great if @
dperson could update.
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Just checked and the latest version of Samba available in the Alpine 3.12 branch is 4.12.2r1, so this docker container cannot be updated.
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A workaround is switching to the edge branch and updating Samba to 4.12.5r0 (and all the system) doing the following:
sed -i -e 's/v[[:digit:]]\..*\//edge\//g' /etc/apk/repositories
apk update
apk upgrade
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OR