Fix MailWizz Installation Problems

The Problem

A previous install attempt left MailWizz throwing errors, showing a blank page, or only partially working — a wrong PHP version, missing extension or botched database import are the usual suspects.

About this problem

A failed or half-working MailWizz installation is almost always caused by an environment mismatch — the wrong PHP version, a missing required extension, or a database import that didn't fully complete — rather than anything wrong with MailWizz itself.

This typically comes up after a DIY installation attempt hits a blank page, a cryptic error, or an admin panel that partially loads but doesn't function correctly.

What's Included

• Diagnosing the installation error from logs and server configuration
• Fixing PHP version, extension or permission issues
• Repairing or re-running the database setup where needed
• Getting MailWizz to a fully working, loggable state

What's NOT Included

• Data recovery if a previous install destroyed existing campaign/list data
• Licence issues with the MailWizz vendor
• Ongoing MailWizz configuration beyond getting it running

How It Works

1. Diagnose the installation error using server logs and MailWizz's own error output.
2. Check and correct PHP version and required extension mismatches.
3. Repair or re-run the database setup if the import was incomplete or corrupted.
4. Fix file/folder permission issues that commonly block installation from completing.
5. Confirm MailWizz reaches a fully working, loggable state with the admin panel functioning normally.

In practice: you buy the service, send over whatever access or details the job needs, I investigate and do the work, and you confirm it's resolved before we call it done.

Frequently Asked Questions

Why does MailWizz show a blank white screen after installation?

This is usually a PHP fatal error — most commonly a PHP version incompatibility or a missing required extension — hidden because error display is often switched off in the environment.

Can a failed MailWizz installation be fixed without starting over?

In most cases yes — the issue is usually an environment or configuration problem rather than corrupted MailWizz files, so fixing the root cause gets the existing install working.

What's the most common cause of MailWizz installation failures?

A PHP version outside MailWizz's supported range, closely followed by missing required PHP extensions.

Will fixing my MailWizz installation recover lost data?

If the previous attempt corrupted or partially wrote data, recovery depends on what's actually recoverable — this is assessed and discussed separately from getting the install itself working.

Do I need root/admin server access to fix a MailWizz installation?

Generally yes, since fixing PHP configuration and file permissions usually requires server-level access, not just MailWizz's own admin panel.

How do I know my MailWizz installation is now fully fixed?

By confirming the admin panel loads and functions fully, and that a real test campaign can be created and sent without error.