I use simple_form, When the form contains pictures in the submission form, the picture saving failed. There is no picture in the submitted record

[maxingjia1314]

Describe the bug A clear and concise description of what the bug is.

To Reproduce Steps to reproduce the behavior:

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2. Click on '....'
3. Scroll down to '....'
4. See error

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Actual behavior What actually happened? Be as specific as possible.

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Environment (please complete the following information):

• Rails version: x.x.x
• trix-rails version: x.x.x
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