WebP error message “file is not an image”

Thanks for the link to the other forum post! I do see you’ve already done quite a bit of troubleshooting. Reviewing the forum post you linked this particular part does seem of interest:

after only leaving the regenerate thumbnail plugin active and running it, i got the same error message: “file is not an image

Could you share a screen recording of the process you’re using to regenerate thumbnails, as described here? We’ll want to see how the error is created when just the Regenerate Thumbnails plugin is active

Thanks for your response, here goes the link:

https://jmp.sh/s/AKaV6AbNbUy9DppjDb4q

@blackburnfox

Did you recieve the video? or should i send a new link?

Regards Nicolas

That is quite odd. When I test a WebP image on my own example site, with no other plugins active and a default theme, I have success. This is the image I tested with: https://www.gstatic.com/webp/gallery/3.sm.webp. You can see how things went for me with that image here: https://d.pr/v/WjoafQ

This does indicate there’s something about your set up that is causing the issue. From the tests you’ve already done you have elimnated other plugins, leaving just the image file on your site, how your host is handling the file or your site set up, as the cause of the trouble. I do see in your screen recording, there do still look to be several active customizations on the site from default www.remarpro.com that I assume comes from your theme, Xstore:

(Image link: https://d.pr/i/eIBE6c )

From my tests it’s clear that the Regenerate Thumbnails plugin is working with WebP images, and from the information you’ve shared it does look there are changes made to your site that could cause conflicts resulting in the trouble you’re seeing. I would suggest reaching out to your theme developer as a next step. I see here in their guidance that they recommend Regenerate Thumbnails. If they are unable to help, then your next steps will be to try replacing the image file and reaching out to your host

Hello again @blackburnfox

Thanks for your response!

I have tested the theme to see if that was the case, check video (twenty theme)
https://jumpshare.com/s/56EhkCjWnHJ5BilgRbwo

I tried these ones for the test:
https://elmate.no/wp-content/uploads/2024/08/Test-2.webp
https://elmate.no/wp-content/uploads/2024/08/cup_v3_1200px.webp

I am also unable to edit webp inside the media gallery, please check video doc:
https://jumpshare.com/s/zEFWsyGTwvFM1GELUHO6

Appreciate your help here!

Regards Nicolas

@blackburnfox

I did a test with the image you used, and it worked?

Why arent my webp images working? seems to be something about the specific files then?

This is very positive as the problem points towards something in the file.

It is not your plugins fault then i guess, but really hope you can help if you have an idea on how to fix it

Regards Nicolas

Thank you for that! Since you’ve ruled out your theme, and the image itself isn’t working right with your www.remarpro.com system, as you’re unable to edit it, then the next things to investigate are the image itself and checking in with your hosting set up. You can investigate the image by trying to upload another WebP image and see if it acts similarly. If you reach out to your host, I recommend sharing with them all the info you’ve shared in this thread and your other forum thread.

From everything you’ve shared, it does not look like the cause of the issue is the Regenerating Thumbnails plugin itself.