The error message you're encountering indicates that the describe_type() function from the GuzzleHttp library is being declared multiple times, leading to a conflict. This typically happens when multiple versions or instances of the Guzzle library are loaded simultaneously.

Understanding the Issue:

In your setup, it appears that two plugins are including their own versions of the Guzzle library:

1. SSML Processor Plugin: This custom plugin includes the AWS SDK, which in turn includes Guzzle.
2. eRoom - Zoom Meetings & Webinar Pro Plugin: This plugin includes its own version of Guzzle.

When both plugins are active, PHP attempts to load the describe_type() function from both instances of Guzzle, resulting in a "Cannot redeclare" error.

Potential Solutions:

1. Use Composer for Dependency Management:

• If possible, refactor your plugins to use Composer for managing
  dependencies. Composer ensures that each package is loaded only once, preventing such conflicts.
• By centralizing dependency management, you can control the versions of libraries used across different plugins, reducing the risk of conflicts.

2. Namespace Isolation:

• refactoring to use Composer isn't feasible, consider isolating the namespaces of the Guzzle library in one or both plugins. This involves modifying the autoloaders or using tools like PHP-Scoper to create a prefixed version of the library, ensuring that each plugin uses its own isolated version without conflicts.

3. Check for Multiple Inclusions:

• Ensure that the Guzzle library isn't being included multiple times within the same plugin or across different plugins. Use include_once or require_once to prevent multiple inclusions of the same file.

4. Update Plugins:

• Check if there are updates available for the conflicting plugins. Plugin developers often address such issues in newer releases by updating dependencies or changing how they are loaded.

5. Contact Plugin Developers:

• If the issue persists, consider reaching out to the developers of the conflicting plugins. They might be aware of the issue and could provide a solution or workaround.

References:

• A similar issue was discussed on Stack Overflow, where the conflict was resolved by managing dependencies through Composer: STACK OVERFLOW

By implementing one of these solutions, you should be able to resolve the "Cannot redeclare GuzzleHttp\describe_type()" error and ensure that your plugins function correctly without interfering with each other's dependencies.