Error saving trail while trying to add pictures

[truenicoco]

I can not add pictures to a trail. It used to work but I now have "Error saving trail". The image seems to upload fine and I can choose it as thumbnail, but I cannot save the trail. I have not found anything in the backend logs. The JS console in the browser displays this error:

**SyntaxError: JSON.parse: unexpected character at line 1 column 1 of the JSON data [9.IyDMxZNP.js:1:60757](https://xxx.xxx.fr/_app/immutable/nodes/9.IyDMxZNP.js)
    Immutable 6
        onSubmit
        V
    (Asynchrone : promise callback)
        V
        x
    (Asynchrone : promise callback)
        x
    (Asynchrone : promise callback)
        x**

I'm running wanderer through docker-compose, and pulled the latest images today.

[Flomp]

That error does not have to be directly linked to image uploading. Something seems to go wrong while saving and you get this somewhat generic error. Can you save the trail without the images?

[pahham]

Same error here. And I can save the trail without images.

[truenicoco]

I can save the trail if I remove the picture(s) and it seems to work fine. I have another trail saved a few months ago, where I had no issue adding the picture which is still used as thumbnail. So it was not always broken.

[Thovi98]

What's the size of your pictures?

[Flomp]

Valid question. If your images are bigger than 5MB you will run into an error. I should probably be more specific in the error message.