In order to fix the issue, navigate to Settings > Apps/Applications, select the Galaxy Call Recorder tool from the list and clear all cache and data. If it doesn't help, uninstall the program and then install the updated version from Google Play Store. Also, go to Settings > Apps/Applications > App Manager, tap Default Application Settings and select Galaxy Call Recorder as the default recorder. If you have issues, use duzhar@gmail.com
email address to get in touch with the support team.