### Steps to reproduce

1. Login as a user and navigate to a project where you have permissions to add an IFC model. Begin of the insertion

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End of the deletion 2. Navigate to BCF module Begin of the insertion

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End of the deletion 3. Click on _IFC models (Industry Foundation Classes)_ Begin of the insertion

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End of the deletion 4. Try to upload a new IFC model with a file size larger than the max. allowed attachment file size (Administration -> System Settings -> Attachments) Begin of the insertion

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End of the deletion 5. Receive an error message Begin of the insertion


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End of the deletion ### What is the buggy behavior?

* The error message does not show the correct error reason (file size to large). Begin of the insertion

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End of the deletion * OP instead shows an error message that is misleading (see screenshot below) Begin of the insertion


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End of the deletion ### What is the expected behavior?

1. The error message should indicate that the allowed attachment file size is the reason why the file could not be uploaded. Begin of the insertion


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End of the deletion ### Screenshots and other files

Misleading error message:

<img class="op-uc-image op-uc-image_inline" src="/api/v3/attachments/88051/content">

### Environment information

**OpenProject installation type**

* [ ] Hosted cloud edition
* [ ] Packaged installation
* What distribution? Begin of the insertion

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End of the deletion * [x] Docker All-in-one container (probably affects all environments)
* [ ] Docker-compose installation
* [ ] Other (please specify)

**Browser**

* [ ] Chrome
* [x] Firefox
* [ ] Safari
* [ ] Mobile Safari
* [ ] Other (please specify)

**Language**

_EN_ Begin of the insertion

##### _When Fixed Back Port to the following Versions_

* [ ] _14.0.x - <mention class="mention" data-id="80250" data-type="user" data-text="@Kabiru Mwenja">@Kabiru Mwenja</mention>_End of the insertion