Scan your system with the fresh version of Malwarebytes to see if it gets rid of the malware and the extension.

Opera hasn't made statement.

You can play with uBlock Origin Lite and AdGuard Adblocker MV3 Experimental if you want to see how progress is going with MV3 adblockers.

@yamiadab45 Did you read the topic?

@axim703 Don't know even if they will.

@maggiemalady I am very sorry but this forum system won't let me delete or edit any comment after the first few minutes I made it, left out for the older comments.

Solutions for this problem may vary, depending from the single user's browser situation.

That problem message could be caused from both:

simple situation, that could easily be solved going the standard extensions update way: go to extension manager (click the "cube" icon) and look for the upper right Update button, or if not there, for (usually topping) any extension requiring user intervention, say update or option/permission change - if you can solve the problem at this level, you have no need to go further;

or more complicated situation, which involves:

changing the way you launch the Opera browser (just for this time only, or, preparing a new shortcut for it, or, permanently). That is, adding an additional option to the command that launches Opera. This will enable you to view something different in extenson manager, and hopefully, solve the problem.

to easy your way, have a text editor ready open, as notepad or textpad or whatever (not office or word). This lets you prepare the command beforehand, the copy it away for execution in one of the available ways.

begin with, copying to the editor the current actual execution path of Opera.
You can get it from Opera itself in About page; or, you can get it from current Opera execution shortcut properties (usually right-click or long press context menu, properties).

now in editor, you have to add, to the end of command, a single space (required), then this additional option (as said in many above posts):

--show-component-extension-options as a sample only, for instance, this is the result for Windows, if Opera installed in local profile: C:\Users\<USERNAME>\AppData\Local\Programs\Opera\launcher.exe --show-component-extension-options

NOTE: here <USERNAME> means your current local path username.

having the command ready in the editor, we can proceed.

before all, be sure to be closing / killing all the Opera browser instances running, and wait for it all to end completely (totally: after closing Opera, go to task manager of your system and wait for it all to end, better way - if short on memory or too many tabs, you will have to wait some more time - , or eventually kill them if totally hung - caution, there's some risk doing it this way).
Wait also for the Opera autoupdate stuff to end totally if running (still look for it in task manager).

how to proceed to execute the command: you can either do it different ways, depending on what actually you want to do:

only once, say:

via command line execution / command prompt, or whatever named in your system;

or, by direct command execution box (Alt-R in Windows)

or more steady:

by expressly making a new Opera shortcut for it, with the above command inside (also execution path field is required to be set, to point to the exe container folder position), and saving it by naming something different from the main usual shortcut (note: this is the preferred way, because this problem is somewhat recurring from time to time, and having a solution ready to go is more straightful);

or finally, by modifying the standard Opera shortcut, to add that option permanently to your Opera runs (this will left in permanence the hidden extensions unhidden, which could be nice or not, depending from your thoughts).

You have to understand that this stuff is because some Opera browser's components are actually implemented by using the browser extensions infrastructure (it is more easily updateable) but are kept as totally hidden from user's eyes (this could leverage some privacy concerns, read forth).

So proceed with one of the above solutions, restarting the browser with that additional -- option this will make all the hidden extensions visible in the extensions manager (the cube icon), enabling you to do the required update from there: after restart with -- option, go to extension manager - the cube - you will see many unknown "before hidden" extensions; one or more of them is probably requiring the permission update or some other intervention kind.

The hidden extension are there, and cannot actually be removed or disabled. For some of them, this is not posing any question, for others, it is doubt what they are for and what data they can eventually carry out or in.

Seems that (see other posts in thread), more privacy concerned Chromium derived browsers, like for instance Vivaldi or Brave, have far less of them, but some hidden extensions are still required to have some browser's additional functionality actually work.

This comment is an effort to try to do a reasonable general-purpouse resume of the above posts, but you can read further above for more details, or something I've eventually left out.
You can read all the posts in that thread for more details, many users have posted additional useful infos and screens.

This problem has been "solved" many times by Opera developers, but it is recurring sometimes, and the "--" option procedure is sometimes required to shout off the persisting message and/or the red dot by the cube in the left bar.

So, it seems this could be a good practice to have saved an Opera shortcut with this option ready somewhere.