Intuit offers multiple tips to address this issue. All you need is to follow a tip or all of them to fix the issue. For desired outcome, apply the tips in the order shared below.
Step 1: Assess the Quickbooks .pdf converter.
Step 2: If you are using a USB drive, copy the changes file to your local hard drive beforehand.
Step 3: Upgrade Quickbooks to the latest version.
Step 4: Troubleshoot the error and re-create the changes using technical skill.