Regards!
Before we say goodbye, I want to learn about what the plugin is it? Simple Ads Manager or SAM Pro (Free Edition)?
I had Simple Ads Manager, but installed SAM Pro (Free Edition) on your recommendation. Hence it is SAM Pro (Free Edition) that I am having trouble with.
Have you checked this plugin for compatibility with other plugins installed?
The only one I think could cause an issue would be WP Fastest Cache, but they were the ones to recommend Simple Ads Manager to begin with, which I now had to switch to SAM Pro (Free Edition).
Do you have any known conflicts or type of plugins that it is in conflict with?
I don’t have such a list.
If this plugin caches files of Admin Side you should clear cache before using new plugin…
Admin is excluded from the Cache, but cleared it anyway but no luck.
What error shows Google Chrome (F12)?
I’m getting the same issue. Below are the errors I’m seeing. I just switched over to SAM Pro (Free Edition) from Simple Ads Manager due to the JSON errors I was getting before.
admin.php?page=sam-pro-places:59 Failed to decode downloaded font: http://geek-craft.com/wordpress/wp-content/plugins/sam-pro-free/css/common-images/ejicons.woff?-dzszjm
admin.php?page=sam-pro-places:59 OTS parsing error: invalid version tag
admin.php?page=sam-pro-places:59 Failed to decode downloaded font: http://geek-craft.com/wordpress/wp-content/plugins/sam-pro-free/css/common-images/ejicons.ttf?-dzszjm
admin.php?page=sam-pro-places:59 OTS parsing error: invalid version tag
admin.php?page=sam-pro-places:1 Failed to decode downloaded font: http://geek-craft.com/wordpress/wp-content/plugins/sam-pro-free/css/common-images/ejicons.woff?-dzszjm
admin.php?page=sam-pro-places:1 OTS parsing error: invalid version tag
admin.php?page=sam-pro-places:1 Failed to decode downloaded font: http://geek-craft.com/wordpress/wp-content/plugins/sam-pro-free/css/common-images/ejicons.ttf?-dzszjm
admin.php?page=sam-pro-places:1 OTS parsing error: invalid version tag
admin.php?page=sam-pro-places:1 Failed to decode downloaded font: http://geek-craft.com/wordpress/wp-content/plugins/sam-pro-free/css/common-images/ejicons.woff?-dzszjm
admin.php?page=sam-pro-places:1 OTS parsing error: invalid version tag
admin.php?page=sam-pro-places:1 Failed to decode downloaded font: http://geek-craft.com/wordpress/wp-content/plugins/sam-pro-free/css/common-images/ejicons.ttf?-dzszjm
admin.php?page=sam-pro-places:1 OTS parsing error: invalid version tag
This means that not all files are loaded correctly. Try reinstalling the plugin manually.