Print Page - Website hosted in Plesk shows 500 error: Provider cannot be found. It may not be

Title: Website hosted in Plesk shows 500 error: Provider cannot be found. It may not be
Post by: Suhitha on Oct 23, 2025, 05:02 AM

Question: Website hosted in Plesk shows 500 error: Provider cannot be found. It may not be properly installed.

Applicable to:

Plesk for Windows

Symptoms

Website hosted on Plesk does not work:

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Internal Server Error 500

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The 'Microsoft.Jet.OLEDB.4.0' provider is not registered on the local machine.

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HTTP Error 500.0 - ASP.NET Core IIS hosting failure (in-process)

While accessing website directly from the server shows:

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Could not load file or assembly 'XXXXX' or one of its dependencies

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Assembly binding logging is turned OFF

Enabled Failed request tracing shows the following:

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Provider cannot be found. It may not be properly installed.

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ModuleName IsapiModule
Notification EXECUTE_REQUEST_HANDLER
HttpStatus 500
HttpReason Internal Server Error

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The requested resource is in use (0x800700aa)

Cause

32-bit application mode is disabled in application pool settings.

Resolution

1.Log in to Plesk

2.Go to Domains > example.com > Dedicated IIS Application Pool for Website

3.Check the checkbox Enable 32-bit applications and click OK

(https://pix.cobrasoft.org/images/2025/10/23/25.png)

Cobra Forum

Plesk Panel => Webserver => Topic started by: Suhitha on Oct 23, 2025, 05:02 AM