Troubleshooting TWINT Plugin Certificate Uploads in Shopware 6

TWINT Plugin Certificate Upload Fails in Shopware 6: A User's Experience

A Shopware 6 user reported an issue while configuring the TWINT plugin. Specifically, they were unable to upload their SSL certificate (.p12 file) through the Shopware admin panel (Settings → Extensions → TWINT credentials).

The error message displayed was:

The selected file „12356989-87fe-4ede-9c30-c7cbe85e4a86.p12“ has an unsupported format. Please use one of the following types: application/x-pkcs12.

Despite the error message, the user confirmed the validity of the certificate file using the following OpenSSL command:

openssl pkcs12 -info -in 12356989-87fe-4ede-9c30-c7cbe85e4a86.p12 -noout

This command verifies the integrity and content of the PKCS#12 certificate, suggesting the file itself was not corrupted or invalid.

Possible Causes and Workarounds

The user noted that the issue seemed to be browser-specific. While the certificate upload worked correctly in Safari on iOS, it failed in both Chromium and Firefox on Ubuntu 24.04. This points towards a potential JavaScript issue or browser compatibility problem within the Shopware admin interface.

Potential Causes:

• Browser Compatibility: The JavaScript code responsible for handling file uploads might not be fully compatible with all browsers.
• JavaScript Error: A JavaScript error could be preventing the upload process from completing correctly.
• Server-Side Issue: Although less likely given the browser-specific behavior, there might be a server-side issue preventing the file from being processed.

Workarounds:

• Try a Different Browser: As demonstrated by the user, attempting the upload in a different browser (e.g., Safari, Chrome, Firefox, Edge) can sometimes resolve the issue.
• Clear Browser Cache and Cookies: Clearing the browser's cache and cookies can sometimes resolve conflicts caused by outdated or corrupted data.
• Check Browser Console: Open the browser's developer console (usually by pressing F12) and look for any JavaScript errors that might be occurring during the upload process.
• Update Browser: Ensure the browser is updated to the latest version.
• Contact Plugin Developer: If the issue persists, contact the TWINT plugin developer for support. They may be aware of the issue and have a fix available.

This forum thread highlights the importance of testing plugin configurations across different browsers and environments. It also demonstrates a practical approach to troubleshooting certificate upload issues in Shopware 6.