i tried already 20+ times to upload the extension or add on or whatever this called.
i also get help from ai and other sources too but still getting hte same type of error
i literally broke up with this issue and finally came here to find the solution

let me tell u what i exactly did

first i go to https://addons.opera.com/developer/upload/
that link
then upload the extension file with zip,
also behind the persona.ini file there was

[Info]
Name=Temp Mail by Boomlify
Description=Boomlify is a modern temporary email service that provides long-lasting disposable emails with multiple domains, smart inbox preview, and a clean centralized dashboard to manage everything in one place. It lets users instantly generate temp emails without registration, choose custom addresses, and even extend email lifespans beyond the usual short limits. Boomlify also supports Gmail-based temp emails, guest and registered user modes, and cross-device access with a privacy-first design. For developers, Boomlify offers a powerful Temp Mail API with custom domain support, smart caching, rate limits, and detailed docs with examples in multiple languages, making it easy to integrate disposable emails into apps, websites, or automation workflows.
Version=1.0.0
Author=Boomlify
HomepageURL=https://boomlify.com
Icon=icons/icon128.png
Manifest=manifest.json

[Extension]
Type=extension
ManifestVersion=3
ChromeCompatible=true
FirefoxCompatible=false
OperaCompatible=true

[Locale]
DefaultLocale=en_US

[Theme]
DarkMode=false

also i simplified this to
; This is a minimal persona.ini to satisfy Opera's theme validator.
Name=Temp Mail by Boomlify
Author=Boomlify

Image=image.png
Position=center center
Image=image.png
Overlay=dark
this

and i tried with different format and many try
but still faces this issue
please anyone help me to solve this

thanks to all