Modified plugins are the #1 way malware is injected into WordPress sites. A "fixed" plugin might work perfectly for migration but leave a hidden script that allows hackers to access your server later.
Utilizing older versions of the plugin that had more lenient restrictions before the developers tightened the paywall. The Risks of Using Nulled Plugins from Babiato babiato all in one wp migration fixed
Altering the constants.php file to increase the AI1WM_MAX_FILE_SIZE value. Modified plugins are the #1 way malware is