WordPress’ error message: The plugin has no valid header
Marc Wagner
June 15, 2021
The error message is triggered by WordPress. It is located in the file wp-admin/includes/plugin.php at line 1108.
The error is triggered as soon as the plugin header requirements are not given.
Requirements for the header can be found in the WordPress plugin manual.
Solution:
First, you should check if the application is a WordPress plugin.
If so, it is recommended that you manually re-upload the application to your server. The best way to do this is to use an FTP client. In some cases, it can happen that files cannot be written correctly.
If you have programmed the plugin yourself, check if the header in your plugin file is correct (see above).
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Marc Wagner
Hi Marc here. I’m the founder of Forge12 Interactive and have been passionate about building websites, online stores, applications and SaaS solutions for businesses for over 20 years. Before founding the company, I already worked in publicly listed companies and acquired all kinds of knowledge. Now I want to pass this knowledge on to my customers.