Site gets blows up when user add AWS 'Secret access key'.

[mohitwp]

Describe the bug

Note : I have used my S3 credentials.

When user enter secret access key and click on Save button, then it produces a Fatal error, and the site stops working.
This creates permanent error in the DB on the website and after that user cannot activate secure-media plugin. Deleting and installing new plugin also not works.

Note : This issue also exist on WP 5.8

Steps to Reproduce

1. Go to Settings > media.
2. Enter As Access key.
3. Click on Save settings.
4. Details will get save successfully.
5. Now enter secret access key.
6. Notice Fatal error.

Screenshots, screen recording, code snippet

Environment information

OS - Windows 11
Browser - Chrome - Version 98.0.4758.102 (Official Build) (64-bit)
PHP version -7.4
WP version 5.8 and 5.9
Secure mediaPlugin version - 1.0.5

WordPress information

No response

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