After adding a Simple:Press plugin to your website and you receive an activation error it could be caused by uploading a plugin with the wrong file name or an issue where a plugin was uploaded but the Zip file working folder was not deleted after the install.
If you are seeing an error after uploading a Simple:Press plugin here are a few things you can check.
When downloading a plugin to add to your site it will comes in a Zip file. You do not need to unzip the file to use the Simple:Press uploader.
The Plugin you upload must be the same name as the plugin. For example if you download the plugin named “subscriptions” it comes in a Zip file named “subscriptions.zip” if for any reason your download is renamed to something other than subscriptions.zip like subscriptions(1).zip or subscriptions-1.zip you must rename the file back to “subscriptions.zip” before uploading.
After uploading the plugin there will be a new folder created under your /forum-plugins folder with the name of the plugin and will contain it’s contents. If the folder name does not match the plugin name. IE, “subscriptions” and is named something like /subscriptions-1 then you will have to manually rename the folder to “subscriptions”
If you are seeing an error after installing and activating a plugin look at the error line closely and see if there is a 1 (or any other number) after the folder name. If so you will need to rename the folder, removing the 1 or any other characters, to match the name of the plugin.