Stuck at “Checking Extensions Compatibility”

Hi there. I hope you are well.
This is likely a server problem, not related to the plugin or its extensions.
I will list the issues that could be happening below:
1. Timeout issues – increase max_execution_time to at least 30 seconds
2. Server side errors – increase memory_limit to 256M or 512M if your site is large or has many plugins installed. Check error log of the webserver and php
3. Security plugins, mod_security, web firewalls – if you use such plugins or tools, try to disable them temporarily, clear cache and attempt to use the plugin again

Here is what you should do:
1. Update all All-in-One WP Migration. If you have any extensions, uninstall them and try again.
2. Increase PHP memory limit and execution time
3. Temporarily disable security plugins/firewalls
4. Clear browser cache and cookies
5. Use a different browser or incognito mode
6. Check server error logs for PHP errors