suryapss

Ok so tit for tat , this is done by a malware or virus on your website which creates .htaccess file in every subdirectory of public_html , to deal with it I have prepared a script for hotfix

Create a file in home directory of user (/home/exampleuser) with any name such as fix_malware.sh and copy and paste the below content

#/bin/bash

#This script delets all htaccess files which contain FileMatch keyword

echo "Starting Script"

find ./public_html -name ".htaccess" | while read line ;
        do
                grep -q "FilesMatch" $line
                if [ $? == 0 ]; then
                rm $line
                else
                echo not found
                fi
        done

after pasting the content make sure to give executable permission to the script file, with command chmod u+x ./fix_malware.sh and atlast run the script by calling ./fix_malware.sh .

After the script will finish executing you may see your websites working again, but some of them must be misbehaving because of missing htaccess file , sadly you need to find correct htaccess file and paste at the project desired location .

Note I ran the above commands from home directory (/home/exampleuser) , dont forget to change paths if you are running from any other location.

Hope this helps
Happy Coding