Due to a large number of cryptocurrency logo images included into the plugin, its size is more than 135 MB. In some hosting environments it could break the limits imposed by PHP settings and you will see one of the following errors when uploading the plugin:
Warning: POST Content-Length of 135615849 bytes exceeds the limit of 52428800 bytes in Unknown on line 0
Are you sure you want to do this?
The uploaded file exceeds the upload_max_filesize directive in php.ini.
There are 2 options to resolve it and install the plugin.
Change PHP settings
If you have access to PHP settings on your server set the following parameters in php.ini (usually you can also override these settings in .user.ini or .htaccess. For more information check PHP documentation):
Please note that changes to php.ini require restart of the web server (Apache, IIS, Nginx) to take in effect.
Upload the plugin via FTP
Unzip and copy the plugin contents via FTP or a web based file manager (cPanel, Plesk etc) to <WordPress ROOT>/wp-content/plugins/cryptocurrency-charts folder. After all files are copied you can activate the plugin through the WordPress admin interface.