When the Approve workflow action is executed on an item and its field values are not empty, the following message might appear in the Validation Results dialog:
This message appears if the Required workflow validation rule is set on some item fields.
To resolve the issue, consider one of the following options:
Be aware that the hotfixes were built for a specific Sitecore XP versions, and must not be installed on other Sitecore XP versions or in combination with other hotfixes. In case any other hotfixes have already been installed on a certain Sitecore XP instance, send a request for a compatibility check to Sitecore Support.
Note that the ZIP file contents must be extracted to locate installation instructions and related files inside. The hotfixes must be installed on a CM instance and then synced with other instances using standard development practices.
Before applying the hotfix: make sure that your instance has the out-of-the-box versions of the assemblies included in a hotfix package.