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Akeeba Backup for Joomla!

#43046 The checksum verification failed. Please make sure you are using the correct update server!

Posted in ‘Akeeba Backup for Joomla!’
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Environment Information

Joomla! version
Joomla! 6.1.1
PHP version
8.3.31
Akeeba Backup version
Pro 10.3.4

Latest post by linpi on Friday, 19 June 2026 04:36 CDT

linpi

Hello,

On many websites, I cannot update to the latest version (Pro) 10.3.5, and I receive the following message: 'The checksum verification failed. Please make sure you are using the correct update server!'

I have RSFirewall and JCH Optimize on a few sites, so I tried websites without these plugins like https://www.mhenneke.de . But I get the same error.

What should I do? I use BackupMonkey.io so that I don't have to update each site manually.

Thank you for your help!
Best regards,
Pierre

nicholas
Akeeba Staff
Manager

It looks like the CDN cache wasn't reset, at least not in the CDN edge node that was serving you. Let me do a manual, global CDN cache reset now. It will take about 1 to 6 hours for your sites to start seeing the correct update information (Joomla implements its own cache).

Nicholas K. Dionysopoulos

Lead Developer and Director

🇬🇷Greek: native 🇬🇧English: excellent 🇫🇷French: basic • 🕐 My time zone is Europe / Athens
Please keep in mind my timezone and cultural differences when reading my replies. Thank you!

linpi

ok, I will try tomorrow. 

Thank's a lot

linpi

today it works again :-)

 

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