Unable to validate my domain since the last couple of days due to signature algorithm not supported (it was working fine before)

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To upgrade OpenSSL on ubuntu 14, try:

openssl version
 [OpenSSL 1.0.1f 6 Jan 2014]
cd /usr/local/src/
wget https://www.openssl.org/source/openssl-1.1.1q.tar.gz --no-check-certificate
tar -xf openssl-1.1.1q.tar.gz
cd  openssl-1.1.1q
./config --prefix=/usr/local/ssl --openssldir=/usr/local/ssl shared zlib
make
make test
make install
cd /etc/ld.so.conf.d/
vi openssl-1.1.1q.conf
 [add: /usr/local/ssl/lib]
sudo ldconfig -v
mv /usr/bin/c_rehash /usr/bin/c_rehash.BCKUP
mv /usr/bin/openssl /usr/bin/openssl.BCKUP
vi /etc/environment
 [update: PATH="/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/usr/local/games:/usr/local/ssl/bin"]
source /etc/environment
echo $PATH
which openssl
 [/usr/local/ssl/bin/openssl]
openssl version
 [OpenSSL 1.1.1q  5 Jul 2022]
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