Unable to update plugins in WordPress: The plugin has not been updated due to unrecognized reason

Symptoms

• Updating plugins on a specific WordPress site on the WordPress Toolkit fails with error:

  Unable to update plugin 'plugin-name', details: The plugin(plugin-name) has not been updated due to unrecognized reason

• Updating from WordPress admin dashboard returns an empty error:

  Update failed:

• There are many active WordPress plugins on the site (e.g. 5 pages).

Cause

Incorrect error reporting that is planned to be improved in the scope of task EXTWPTOOLK-10316.

Resolution

Consider the information and resolution described on this article.