Contact Form 7 version 5.4 was released on February 24, 2021. It contains a lot of breaking changes which cause many issues with PDF Forms Filler for Contact Form 7. We are currently working on making PDF Forms Filler for Contact Form 7 compatible with the new version of Contact Form 7. Meanwhile, the solution at this time is to downgrade to a previous version of Contact Form 7 (version 5.3.2). Please take care to not delete your existing forms when you perform the downgrade (don’t delete the Contact Form 7 plugin). You can use the WP Rollback plugin to do the downgrade. Be sure to disable auto-updates for the Contact Form 7 plugin to avoid it being automatically updated again.
The release announcement post by the developer of Contact Form 7 goes into more details about what changed. The changes that affect PDF Forms Filler for Contact Form 7 are as follows:
1. The hiding of
2. Changed output from
3. Download link feature is affected (plain text version of the response message is now shown instead of the HTML version)
We are going to be releasing a new version with compatibility fixes once they become available.