why i am not able to paste anything in htdocs folder in ubuntu

I was having trouble with this as well since Amazon Linux 2 doesn't have epel-release in its repositories, but I've found you can install the EPEL RPM package itself, and then you'll be able to install certbot or certbot-nginx from there.

Download the RPM

curl -O http://dl.fedoraproject.org/pub/epel/epel-release-latest-7.noarch.rpm
Then install it

sudo yum install epel-release-latest-7.noarch.rpm
Now you can install certbot

sudo yum install certbot
And then run it as usual

sudo certbot
Check out the certbot page for configuration details after that.

sudo chown yoggesh:yoggesh /opt/lampp/htdocs
sudo chmod 777 /opt/lampp/htdocs

Directories must have execute permissions to be usable;
Usually this is 0755.
PHP scripts run via mod_php are not executed but rather read;
0644 will suffice for this.

Try to add internet permission in android folder(do nothing with IOS part). Or jsut reinstall app.

// Install PHP 7.3
curl -s http://php-osx.liip.ch/install.sh | bash -s 7.3