Fix DtypeError message for reference validation #2918

	name: Run PyNWB tests
	on:
	pull_request:
	schedule:
	- cron: '0 5 * * *' # once per day at midnight ET
	workflow_dispatch:

	jobs:
	run-pynwb-tests:
	runs-on: ubuntu-latest
	concurrency:
	group: ${{ github.workflow }}-${{ github.ref }}
	cancel-in-progress: true
	steps:
	- name: Checkout repo with submodules
	uses: actions/checkout@v4
	with:
	submodules: 'recursive'
	fetch-depth: 0 # tags are required to determine the version

	- name: Set up Python
	uses: actions/setup-python@v5
	with:
	python-version: '3.12'

	- name: Update pip
	run: python -m pip install --upgrade pip

	- name: Clone PyNWB and install dev branch of HDMF
	run: \|
	python -m pip list
	git clone https://github.com/NeurodataWithoutBorders/pynwb.git --recurse-submodules
	cd pynwb
	python -m pip install -r requirements-dev.txt # do not install the pinned install requirements
	python -m pip install . # this will install a different version of hdmf from the current one
	cd ..
	python -m pip uninstall -y hdmf # uninstall the other version of hdmf
	python -m pip install . # reinstall current branch of hdmf
	python -m pip list

	- name: Run PyNWB tests on PyNWB dev branch
	run: \|
	cd pynwb
	python test.py -v

Provide feedback