Hi there
Waqar has a holiday today, let me try and help.
I logged in to your website and I took a copy (you already have the All in One WP Migration plugin installed) and installed it locally. I activated Types and Views without problem, no errors.
One difference between my own site and yours is that I have the current WordPress version of 5.3.2 installed, while you have an older version. Can you update your site to the latest version?
Your site doesn't currently have either Types or Views installed, so I installed both, and activated Types, but I haven't activated Views yet.
I also tried to use FTP but had the same problem Waqar experienced.
When you activate Views, if it generates a fatal PHP error, WordPress would send you the "The site is experiencing technical difficulties" email, to the address registered as the site administrator, i.e. nine36@nine36.cafe24.com.
If you check that email address you should see emails which describe what the error is.
In any case, if you are able to use FTP you can turn on debugging mode by editing your wp-config.php so that the errors are written to a log which you can then inspect.
Edit your wp-config.php file like so (replacing the existing line that sets the WP_DEBUG constant):
define('WP_DEBUG', true);
define('WP_DEBUG_LOG', true);
define('WP_DEBUG_DISPLAY', false);
define('WP_DISABLE_FATAL_ERROR_HANDLER',true);
When an error is generated that will be recorded in a debug.log file in your /wp-content/ directory which you can examine in any text editor.
So, with this prepared, try again to activate Views, and if it fails with an error, that error will be shown in the debug.log. Please paste the results here.