To solve the issue related to Failure in updating any Post in Wordpress please follow the below steps:
**This may be caused due to any SSL plugin or after integration ssl into your website**
1: Login to your Dashboard f your wordpress, after that click on Add new Plugin.
2: Search the plugin " SSl Insecure Content Fixer" and Install/Activate that plugin and open the settings of plugin.
3: Under the Settings of this Plugin and do the settings as choose Capture All option and recommend settings appeared in Red.
4: After doing all the above steps click on Save changes and then you will able to update any post successfully.