backoffice error Prestashop Backoffice not opening version 9.0

[Mr. Trice]

After installing PrestaShop for the first time with Softaculous. I tried opening the back office but can't open it. It opens with an error. Now I have turned on the debug error, but I don't understand where the error is from. The front office works fine. Here is the link to the office for the error preview: (WORKS FINE NOW) After the solution below.

 

What's the best solution, please? 

Edited August 11 by Mr. Trice
All Resolved (see edit history)

[Andrei H]

Hello,

This is a known issue. There is a fix on the public GitHub repository.

You can either manually apply the code changes or wait for version 9.0.1 to be released, as the above fix was merged.

[lflorencio]

23 hours ago, Andrei H said:

Hello,

This is a known issue. There is a fix on the public GitHub repository.

You can either manually apply the code changes or wait for version 9.0.1 to be released, as the above fix was merged.

Thank you Andrei I made this changes and now I can log gin on Backoffice.

 

I made a Video and it was upload to youtube 

[Mr. Trice]

On 8/10/2025 at 10:12 AM, Andrei H said:

Hello,

This is a known issue. There is a fix on the public GitHub repository.

You can either manually apply the code changes or wait for version 9.0.1 to be released, as the above fix was merged.

Thank you. I will do just that now and give feedback. 

[Mr. Trice]

On 8/10/2025 at 10:12 AM, Andrei H said:

Hello,

This is a known issue. There is a fix on the public GitHub repository.

You can either manually apply the code changes or wait for version 9.0.1 to be released, as the above fix was merged.

Thank you, Andrei; all works fine now. 

[Mr. Trice]

On 8/10/2025 at 10:12 AM, Andrei H said:

Hello,

This is a known issue. There is a fix on the public GitHub repository.

You can either manually apply the code changes or wait for version 9.0.1 to be released, as the above fix was merged.

This worked, but I found out about another error. When you try to edit a shipping carrier, it prompts the error again. 

[Mr. Trice]

Even when you create a new carrier and want to save, it will do the same and so many more. I think it's a big issue altogether. 

[darkin]

Thanks for pointing (from another post) to the solution... Will wait for version 9.0.1.... But anyway there's some place for brainstorming - why i installed without problems on WAMP ( no probs getting to BO, adding categories and products) but have problems on LAMP (url not found when trying to get into BO)??

[lflorencio]

14 hours ago, darkin said:

Thanks for pointing (from another post) to the solution... Will wait for version 9.0.1.... But anyway there's some place for brainstorming - why i installed without problems on WAMP ( no probs getting to BO, adding categories and products) but have problems on LAMP (url not found when trying to get into BO)??

excuse me my english, but when will be available prestashop version 9.0.1? Best regard.