It says the installed game is not compatible.

Are you playing in Spanish?

" DOWNLOADS CHANGELOG
Language Hotfix (26 September 2018)
[WIN] added missing strings for Italian and Spanish versions"

Nope, I meant the version of the Portraits patch it behind the offline version and cannot be applied.

Where is this patch you are talking about?

This one

p.s. but not worth it, I wouldn't use the two extra ones.

Ah. It is probably DLC that I am not entitled to, so I can't see it.

GOG patches are not cumulative (talking about the pre-Galaxy days) so they always check that the version of the game is the correct one, just prior to the patch you want to install. If they don't match expectation, then they throw the compatibility error msg that you found and they refuse to apply.

That said, DLC should not be so finicky about what you can apply it to. I think GOG made a mistake and you should open a support ticket.

I own the imperial edition and the portraits DLC does nothing.

Whether it's installed or not I have only 28 total portraits to choose from.

Does anyone have a link how these 2 bonus portraits supposed to look like?

It is Jamandi Aldori and the "Buergermeister" (forgot the name).

p.s. The portraits DLC has no content, but only changes a setting so you can use those two pictures which are already in the main game of every version.

It's not true. Jamandi Aldori and the other dude are base game portraits. DLC one are female fighter with a rapier or smth (often seen on game arts) and elf wizard.

I saw them when launched a game for the first but after I returned and Language hotfix was installed - they were gone.

OK, I went in and disabled the check if you have the DLC (I have it anyway, but cannot enable it due to bug).
The second in the second row of 1.png and the second in the first row of 2.png.

Same for me. Reinstalled the portraits dlc a few times but they're still not there, while everything else is. What's the problem with two pictures?

I also have this issue. The 2 bonus portraits aren't there but I have my pets and other items.

Also, I noticed a streamer of the game (CohhCarnage on Youtube) have the 2 portraits available on his 1st playthrough but then they disappeared from the portrait screen on his 2nd playthrough.

I went cheap and didnt go for the extra portraits so cant help on this specifically, but theres multiple bundles of good quality custom portraits already available that give alot more choice and seem relevant to the lore.

Probably somebody thought ahead and went raiding various sites/modules for the PNP game online to borrow as many images as possible, thankfully.

Wanna post a link to some you'd recommend?