[Bug]: Signature cannot be saved when user name has special characters

[cube-one-gxp-lifescience-partner]

Issue Description

After uploading a signature it cannot be saved as there is an error message regarding special characters if the user name hasst special characters.

Expected Behavior

The signature can be uploaded and saved.

Current Behavior

The signature can be uploaded but not saved.

Steps to reproduce

1. Have a user account with special characters in its name.
2. Have a signature PNG
3. Upload and save the signature

Screenshots of the issue(optional)

No response

Operating System [e.g. MacOS Sonoma 14.1, Windows 11]

Docker Image

What browsers are you seeing the problem on?

Chrome, Firefox, Microsoft Edge

What version of OpenSign™ are you seeing this issue on? [e.g. 1.0.6]

1.8.1

What environment are you seeing the problem on?

Hosted (app.yourdomain.com)

Please check the boxes that apply to this issue report.

• [X] I have searched the existing issues & discussions to make sure that this is not a duplicate.

Code of Conduct

• [X] I agree to follow this project's Code of Conduct
• [X] I have searched the existing issues & discussions to make sure that this is not a duplicate.

[andrew-opensignlabs]

@cube-one-gxp-lifescience-partner thanks for reporting this. Can you share examples of some special characters that are not supported?

[cube-one-gxp-lifescience-partner]

Yes, the characters I tested are 'ä' 'ö' 'ü' and 'ß'.