Possible to make use of bitly links when you click on the tweet button?

Also, Google+ isn’t showing up

Regarding BitLy, you can read more here:
https://github.com/Julienh/Sharrre/issues/85

As for Google+, ask your webhost to enable urlCurl (cURL) and make sure safe_mode is off. That is a requirement for the Google+ button to work. More here:
https://sharrre.com/

How can I implement the BitLy it to WordPress then? Its HTML/PHP based.

I would suggest asking on that GitHub issue – I have no idea on that one, sorry.

I mean, where can I find the source of the twitter button in the single.php?

Also, cURL is enabled.

/inc/sharrre.php for the buttons.

Check so that safe_mode is off for cURL, as it is a requirement.

Where can I check if safe_mode is off?

Sorry, I found it, it is off.

Go to this URL:
https://YOURDOMAIN.com/wp-content/themes/hueman/js/sharrre.php?url=http%3A%2F%2Fsharrre.com%2F&type=googlePlus

What does it say?

Related:
https://github.com/Julienh/Sharrre/issues/35

I get this error:

<br />
<b>Warning</b>:  curl_setopt_array(): CURLOPT_FOLLOWLOCATION cannot be activated when an open_basedir is set in <b>/home/u794181006/public_html/wp-content/themes/hueman/js/sharrre.php</b> on line <b>56</b><br />
{"url":"https://sharrre.com/","count":0}

I would contact your webhost with that error, and ask if they can sort it out – as the other guys on GitHub did. They had the same error.

Okay, thank you. I will reply here a.s.a.p when I got reply back from the host ??