Accroding to RFC 8555: > The MAC key SHOULD be provided in base64url-encoded form... However, currently we are only decoding the MAC key as base64. This patch uses the correct function to decode the user provided MAC key as base64url format. src/PVE/ACME.pm | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) -- 2.39.3 (Apple Git-145)