I had some similar issues in my program recently with some AMD specific GPUs where it said "Failed to retrieve pixel formation information" in the console.
Then I saw this post.
Since the new SFML 2.6 has been changed in many ways (things like removal of quads and removal of sf::Thread), I decided to build SFML with the fix.
And well, after testing, the pop up in the console did go away, however, sadly, textures are still broken as before.
It may be like 2 different problems (one of them being the textures broken and the other one message in the console), but I have no idea.
Here is an image:
https://cdn.discordapp.com/attachments/858417400918835230/1001966924017709106/unknown.png(hopefully you can see it, this is my first time uploading images to this forum)
AMD tested GPUs:
HD 5770 - works, no problems
RX 550 - doesn't work
Also it seems to not work on AMD Ryzen 5 3500U with Radeon Vega Mobile Gfx
I guess it is because of drivers? Maybe?