I have the similar problem:
Deactivated one of the plugins and now it doesn’t load the website https://www.DmitryRogozhin.com – it just shows the blank white screen. Provider says it’s error 500 – Internal Server Error which could appear because of the plugin.
The main problem is that wp-admin and login.php pages are also white blank screen, and I cannot get into my administration panel to delete plugins or even re-install wordpress software.
Is there any alternative way to fix that 500 error? Ideally – just deleting the plugins, or at least re-install the wordpress software and start the blog all over again…
Thanks for your support!