i think we'll get trouble. Debian test with time in the future:
# service ntp stop
# date --set="2 OCT 2021 18:00:00"
# openssl verify -CAfile fullchain14.pem -purpose sslserver cert14.pem
O = Digital Signature Trust Co., CN = DST Root CA X3
error 10 at 3 depth lookup: certificate has expired
error cert14.pem: verification failed
# service ntp start
# openssl verify -CAfile fullchain14.pem -purpose sslserver cert14.pem
cert14.pem: OK
maybe
sub validateCertificate in
/var/www/imscp/engine/PerlLib/iMSCP/OpenSSL.pm
should be disabled ?