After auto upgrade to 5.8 seeing errors and site unusable - wordpress

After an auto upgrade to 5.8 seeing this error... can't even run the wp-cli to downgrade back to 5.7.2. I forgot to turn off the auto upgrade to this one particular site...
2021/07/23 14:46:03 [error] 83504#0: *10332 FastCGI sent in stderr:
"PHP message: PHP Fatal error: Cannot declare class
WP_Block_Template, because the name is already in use in
/Library/WebServer/clients/test/FASLAND/wp-content/plugins/gutenberg/lib/full-site-editing/class-wp-block-template.php
on line 12" while reading response header from upstream, client:
192.168.1.1, server: xx.xx.com, request: "GET / HTTP/1.1", upstream: "fastcgi://127.0.0.1:9000", host:
"xx.xx.com" 2021/07/23 14:46:04 [error] 83504#0:
*10334 FastCGI sent in stderr: "PHP message: PHP Fatal error: Cannot declare class WP_Block_Template, because the name is already in use in
/Library/WebServer/clients/test/FASLAND/wp-content/plugins/gutenberg/lib/full-site-editing/class-wp-block-template.php
on line 12" while reading response header from upstream, client:
192.168.1.1, server: xx.xx.com, request: "GET /favicon.ico HTTP/1.1", upstream: "fastcgi://127.0.0.1:9000", host:
"xx.xx.com", referrer:
"https://xx.xx.com/"

The critical error is caused by the Gutenberg plugin attempting to redeclare the class WP_Block_Template which is now included as part of the WordPress Core as of version 5.8
Ref: WordPress/wp-includes/class-wp-block-template.php
To resolve this issue, uninstall the Gutenberg plugin.
For WP-CLI, use the command:
wp plugin uninstall gutenberg

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PHP-FPM Conf
http://pastie.org/private/aczklc52ll9yv0uz5drcqg
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