Noted That:

• To install correctly this bitbucket-issues.zip.
• Fisrt Download the bitbucket-issues.zip to your computer
• Extract/Open bitbucket-issues.zip to Your Computer.
• Then, Find readme.txt file inside bitbucket-issues.zip and Open readme.txt.
• Now, Read the Requirements of this plugin. Which Wordpress Version and PHP Version are required to run this Plugin in Your Wordpress Site.
• Then, Follow the the Tips Below.

Start the Tips:

1. First Download "bitbucket-issues.zip" Plugin to your Local Computer. (Click Download)

2. Then, Login to your "yourdomain.com/wp-admin" Dashboard.

3. Then, Click on "Plugins" + "Add New" from left sidemenu of Dashboard.

4. Now, Click on "Upload Plugin" button.

5. Now, Browse "bitbucket-issues.zip" Downloaded plugin from your computer, Where you downloaded bitbucket-issues.zip According to Step – 1 Above then, click on "Install Now"

6. Now, Click on "Active Plugin"

7. Then, See left sidemenu. "Bitbucket Issues Plugin" folder is added on left sidemenu. Now, Click on "Bitbucket Issues Plugin" folder.

   Noted that: If you do not see "Bitbucket Issues Plugin" folder on left sidemenu then, see at left sidemenu "Settings" or "Tools".

8. Now you configure yourself oR Watch video tutorial below about Bitbucket Issues Plugin Configurtions and Settings or How to work "Bitbucket Issues Plugin" in your WordPress site.

After Activated Plugin According to Step-6 then,

1. Go to "Plugins" + "Installed Plugin" from Wordpress Admin Panel Leftside Menu.
2. or Direct go to: https://yourdomain/wp-admin/plugins.php
3. Then, Find "Bitbucket Issues Plugin" Activated Plugin from Plugin List.
4. Then, Click on "Settings" from Plugin that is Bitbucket Issues Plugin
5. Now, Edit/Add/Config the setting and Click on "Save Changes" button,

Check out the official installation guide. It’s totally more awesome than anything I’d be bothered to write here. Plus, wordpress codex is your friend. (Mostly).