Safari 13 on macOS 10.15.3 enabling-extension issue

Safari on macOS 10.15.3 has an issue that you can not enable extensions.

You have to wait the fix until next update. But there is a work around.

Press shift key while booting your mac and enter safe mode.

Open Safari and Preferences  > Extensions. Now you can eneble extensions.

Once you enabled it, Restart your mac.

Done !