System Information
Operating system: Linux-5.8.7-arch1-1-x86_64-with-glibc2.29 64 Bits
Graphics card: GeForce GTX 660M/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 450.66

Blender Version
Broken: version: 2.90.0, branch: makepkg (modified), commit date: 2020-08-31 11:26, hash: rB0330d1af29c0
Worked: Never

Short description of error
The tools popup errors out when in the Image Editor in Paint mode and the active object is set to Sculpt mode.

Exact steps for others to reproduce the error

• Set the spacebar action to Tools.
• Set the default cube to Sculpt mode.
• Open the Image Editor.
• Change the mode from View to Paint.
• Press the spacebar.