I have seen this same question asked several times, but do not see any solutions. Figured I'd ask again and explain the steps I've taken. This bug started about a week ago. Prior to that, I have been able to apply a signature without issue for years. When I go to add a signature, the right pane shows "Retrieving your information" indefinitely, and the "Sign" icon just spins and spins as shown in the following screenshot:
This happens with every PDF
What I've tried already:
1. Uninstalled and reinstalled Acrobat
2. "Repair Installation"
1. Windows 7 Professional SP-12. Adobe Acrobat Pro DC 2015-023-20070
Sorry for the inconvenience.
Launch Acrobat>Help>Check for updates, if there are please try installing. Once the updates are installed, restart your machine and try again.
If the issue persists, launch Acrobat>Edit>Preferences>Security(Enhanced), try turning off protected view. This step is merely for troubleshooting purposes. If the issue is resolved or not, would recommend enabling the feature back.
Also, check this link: Text is garbled in converted file | ExportPDF
Let us know if that helps.