If you see this error when you open a page in experience editor, then this is the post you should look for.
If you want to delete or unpublish all items under a root item using PowerShell script then this is the post you are looking for. This script disables the 'publishable' option of an item in Sitecore.
This post would help you to remove the renderings of multiple items in Sitecore using Sitecore Powershell script. This will remove both Shared and Final renderings of the item.
This post would help you to change the template of some items programatically with Sitecore Powershellscript to a new template. It would actually change the templateId of the item using Powershellscript.
This post provides Sitecore PowerShell script to unlock all items locked in Sitecore by content authors.
Here is a list of Sitecore PowerShell scripts that are useful for every Sitecore developer for making any bulk changes in Sitecore.
Error: warning: Falling back to java on path. This behavior is deprecated. Specify JAVA_HOME\Common was unexpected at this time. Got this error when starting Elasticsearch for the first time.
A Sitecore PowerShell script to check if the selected sub tree of items have the language fallback enabled and update the items to enable the language fallback accordingly