Spyder doesn't run

Getting Started Getting Started Information
1

First thing I tried was launching spyder.

It installs on a python-3.12.7 environment but doesn’t run. Fails with:

2024-11-04 16:14:41.676 python[63610:14597192] +[IMKClient subclass]: chose IMKClient_Modern
2024-11-04 16:14:41.676 python[63610:14597192] +[IMKInputSession subclass]: chose IMKInputSession_Modern
[1104/161442.154383:ERROR:icu_util.cc(251)] Couldn’t mmap icu data file
/opt/anaconda3/envs/PythonPrior/bin/pythonw: line 3: 63610 Trace/BPT trap: 5 /opt/anaconda3/envs/PythonPrior/python.app/Contents/MacOS/python “$@”

Then python dumps core with:

Translated Report (Full Report Below)

Process: python3.12 [63610]
Path: /opt/anaconda3/*/python.app/Contents/MacOS/python
Identifier: python3.12
Version: ???
Code Type: ARM-64 (Native)
Parent Process: Exited process [63609]
Responsible: python [63210]
User ID: 501

Date/Time: 2024-11-04 16:14:42.1569 -0700
OS Version: macOS 15.1 (24B83)
Report Version: 12
Anonymous UUID: EE3C7334-122D-4CFB-DDD0-951FF1D1A757

Time Awake Since Boot: 260000 seconds

System Integrity Protection: enabled

Crashed Thread: 0 Dispatch queue: com.apple.main-thread

Exception Type: EXC_BREAKPOINT (SIGTRAP)
Exception Codes: 0x0000000000000001, 0x0000000112d1a11c

Termination Reason: Namespace SIGNAL, Code 5 Trace/BPT trap: 5
Terminating Process: exc handler [63610]

Thread 0 Crashed:: Dispatch queue: com.apple.main-thread
0 libQt5WebEngineCore.5.15.9.dylib 0x112d1a11c QtWebEngineCore::ColorChooserController::qt_metacall(QMetaObject::Call, int, void**) + 8160
1 libQt5WebEngineCore.5.15.9.dylib 0x112d0a2e0 QtWebEngineCore::WebContentsAdapter::setVisible(bool) + 33412
2 sip.cpython-312-darwin.so 0x1042985d4 sipSimpleWrapper_init + 516
3 python3.12 0x10282e858 type_call + 148
4 python3.12 0x102913a10 _PyEval_EvalFrameDefault + 222788
5 python3.12 0x10283a6c8 slot_tp_init + 544
6 python3.12 0x10282e858 type_call + 148
7 python3.12 0x102913a10 _PyEval_EvalFrameDefault + 222788
8 python3.12 0x10283a5f0 slot_tp_init + 328
9 python3.12 0x10282e858 type_call + 148

Truncated… the full dump is long.