Drupal fails to run on Acquia Cloud.
A common reason is that a custom Drupal module that won't run on Acquia Cloud. If you know which module is causing the problem, you can disable the module using Drush or directly in MySQL.
Important
Create a database backup prior to any significant change to a website, including disabling or enabling modules.
drush @[site].[env] pm-disable [module]Drupal 8/9:
drush @[site].[env] pm-uninstall [module]Where [site] is your Acquia Cloud site name, [env] is the environment that you're updating (example values are dev, test, and prod), and [module] is the name of module that you want to disable.
Alternatively, you can disable the module manually in the database on your Acquia Cloud server.
Important
The MySQL command should only be used as a last resort, and after taking a database backup. It will not disable any modules that are dependent on the module you're attempting to disable, causing more errors.
drush @[site].[env] ah-sql-cliWhere [site] is your Acquia Cloud site name, and [env] is the environment that you're updating (example values are dev, test, and prod).
UPDATE system SET status='0' WHERE name='[module]';Where [module] is the name of module that you want to disable.