Odoo 19 upgrade - ValueError: Unicode strings with encoding declaration are not supported. Please use bytes input or XML fragments without declaration.

Question

When upgrading a custom module to Odoo 19, I get the following error is odoo log:
ValueError: Unicode strings with encoding declaration are not supported. Please use bytes input or XML fragments without declaration.

I have removed the following line from the beginning of the XML files, but still have the same error:
<?xml version="1.0" encoding="utf-8" ?>

Note: I am upgrading from v15 to v19.
What is the fix to such error message?

Cybrosys Techno Solutions Pvt.Ltd · Answer

Hi,

To fix this, ensure that all XML files start directly with <odoo> or <record> and do not include the line <?xml version="1.0" encoding="utf-8"?>. You should also check for invisible BOM characters, which are often added by text editors. Re-save the files using UTF-8 encoding without BOM, preferably in a clean editor like VS Code.

Finally, verify that all XML files listed in the module manifest (__manifest__.py) are properly encoded and do not contain unwanted characters or spaces before the <odoo> tag. Once all files are saved as UTF-8 without BOM, the error will be resolved.

Hope it helps

Codesphere Tech · Answer

Hello, I found the space near question mark inside the tag. Please try below: **

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