Hi Jo-Hanna, are you sure you don’t see a tag like this in your post content: [content_block id=6]
If you don’t see it, the issue is most likely caused by a javaScript error caused by another plugin. Please try using a different browser first or clean out all your temporary internet files. If that does not help, make sure you are using the latest version of WordPress. And finally you could try disabling all plugins except for the Custom Post Widget plugin.
As a workaround, you can always manually insert the abovementioned content_block shortcode in your post (make sure you change the id in the shortcode to the match the content block id).
If you have tried all troubleshooting steps I described above, let me know which internet browser (version), operating system and anti-virus/malware security you are using.
Marking this topic as resolved since I did not receive a response to my troubleshooting steps.
