wp search-replace on database returns PHP fatal error: Array and string offset access syntax with curly braces is no longer supported

Question

So I need to setup a client website locally for improvements. I'm trying to search and replace any instances of the live site's name/url and replace it with a development one.

When I run the command:

wp search-replace 'livesite.com' 'local.lvh.me' --all-tables --precise --verbose

I get the following error:

PHP Fatal error:  Array and string offset access syntax with curly braces is no longer supported in /path_to_project/wp-content/plugins/gravityforms/common.php on line 4181
PHP Stack trace:
PHP   1. {main}() /usr/local/bin/wp:0
PHP   2. include() /usr/local/bin/wp:4
PHP   3. include() phar:///usr/local/bin/wp/php/boot-phar.php:11
PHP   4. WP_CLI\bootstrap() phar:///usr/local/bin/wp/vendor/wp-cli/wp-cli/php/wp-cli.php:27
PHP   5. WP_CLI\Bootstrap\LaunchRunner->process($state = class WP_CLI\Bootstrap\BootstrapState { private $state = [] }) phar:///usr/local/bin/wp/vendor/wp-cli/wp-cli/php/bootstrap.php:74
PHP   6. WP_CLI\Runner->start() phar:///usr/local/bin/wp/vendor/wp-cli/wp-cli/php/WP_CLI/Bootstrap/LaunchRunner.php:23
PHP   7. WP_CLI\Runner->load_wordpress() phar:///usr/local/bin/wp/vendor/wp-cli/wp-cli/php/WP_CLI/Runner.php:1158
PHP   8. require() phar:///usr/local/bin/wp/vendor/wp-cli/wp-cli/php/WP_CLI/Runner.php:1237
PHP   9. include_once() /path_to_project/wp-settings.php:371
Error: There has been a critical error on your website.Learn more about debugging in WordPress. There has been a critical error on your website.

I get that as the error says, curly braces are deprecated and need to be replaces with square braces. If I go to the file specified and change them over the search and replace progresses until it runs into the issue again. Obviously manually changing every occurrence of this error isn't really an option however as it would take days.

Is there a fix to this that I haven't spotted?

Any help would be greatly appreciated as this has been on the desk for awhile!