Sending print job fails on A1 Mini with "invalid UTF-8 byte" error #769

New Issue

MrUnknownDE · 2026-04-05T16:29:43+02:00

MrUnknownDE commented

2026-04-05 16:29:43 +02:00

Originally created by @marcio0 on 2/14/2026

Is there an existing issue for this problem?

I have searched the existing issues

OrcaSlicer Version

2.3.2-dev

Operating System (OS)

macOS

OS Version

Sonoma 14.5

Additional system information

No response

Printer

Bambulab A1 Mini - firmware version 01.04.00.00

How to reproduce

Downloaded dmg file
Installed it by mounting and dragging the application to Applications
Opened Orca Slicer
Send job to print

Actual results

An error shows up with the message An unexpected error occurred: [json.exception.type_error:316] invalid UTF-8 byte at index 33: 0x0D

It happens on existing projects or a new project.

Expected results

The project would be successfully sent to the printer.

Project file & Debug log uploads

debug_Sat_Feb_14_15_05_53_88274.log

encaixe mesa.3mf.zip

Checklist of files to include

Log file
Project file

Anything else?

Downgrading to 2.3.1 makes all my presets disappear. They show up again if I reinstall 2.3.2-dev.

*Originally created by @marcio0 on 2/14/2026* ### Is there an existing issue for this problem? - [x] I have searched the existing issues ### OrcaSlicer Version 2.3.2-dev ### Operating System (OS) macOS ### OS Version Sonoma 14.5 ### Additional system information _No response_ ### Printer Bambulab A1 Mini - firmware version 01.04.00.00 ### How to reproduce - Downloaded dmg file - Installed it by mounting and dragging the application to Applications - Opened Orca Slicer - Send job to print  ### Actual results An error shows up with the message `An unexpected error occurred: [json.exception.type_error:316] invalid UTF-8 byte at index 33: 0x0D` It happens on existing projects or a new project. ### Expected results The project would be successfully sent to the printer. ### Project file & Debug log uploads [debug_Sat_Feb_14_15_05_53_88274.log](https://github.com/user-attachments/files/25317817/debug_Sat_Feb_14_15_05_53_88274.log) [encaixe mesa.3mf.zip](https://github.com/user-attachments/files/25317825/encaixe.mesa.3mf.zip) ### Checklist of files to include - [x] Log file - [x] Project file ### Anything else? Downgrading to 2.3.1 makes all my presets disappear. They show up again if I reinstall 2.3.2-dev.

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Dependencies

No dependencies set.

Reference: github/OrcaSlicer#769