I tried to upgrade ERPNext which landed me into a new issue:
The commands which I executed were:
bench switch-to-branch version-12 frappe erpnext --upgrade
bench update --patch
opt/erpnext/frappe-bench/env/bin/pip install -q -U -e /opt/erpnext/frappe-bench/apps/erpnext
ERROR: Command errored out with exit status 1:
command: /opt/erpnext/frappe-bench/env/bin/python3 -u -c ‘import sys, setuptools, tokenize; sys.argv[0] = ‘"’"’/tmp/pip-install-jzvrj3se/pandas/setup.py’“'”‘; file=’“'”‘/tmp/pip-install-jzvrj3se/pandas/setup.py’“'”‘;f=getattr(tokenize, ‘"’“‘open’”’“‘, open)(file);code=f.read().replace(’”‘"’\r\n’“'”‘, ‘"’"’\n’“'”‘);f.close();exec(compile(code, file, ‘"’“‘exec’”’"‘))’ bdist_wheel -d /tmp/pip-wheel-63uot4b2
copying pandas/tests/indexes/period/test_tools.py → build/lib.linux-x86_64-3.8/pandas/tests/indexes/period
copying pandas/tests/indexes/period/test_period_range.py → build/lib.linux-x86_64-3.8/pandas/tests/indexes/period
copying pandas/tests/indexes/period/test_asfreq.py → build/lib.linux-x86_64-3.8/pandas/tests/indexes/period
copying pandas/tests/indexes/period/test_ops.py → build/lib.linux-x86_64-3.8/pandas/tests/indexes/period
creating build/lib.linux-x86_64-3.8/pandas/tests/io/json
copying pandas/tests/io/json/init.py → build/lib.linux-x86_64-3.8/pandas/tests/io/json
copying pandas/tests/io/json/test_readlines.py → build/lib.linux-x86_64-3.8/pandas/tests/io/json
copying pandas/tests/io/json/test_compression.py → build/lib.linux-x86_64-3.8/pandas/tests/io/json
copying pandas/tests/io/json/test_pandas.py → build/lib.linux-x86_64-3.8/pandas/tests/io/json
copying pandas/tests/io/json/test_normalize.py → build/lib.linux-x86_64-3.8/pandas/tests/io/json
copying pandas/tests/io/json/test_ujson.py → build/lib.linux-x86_64-3.8/pandas/tests/io/json
copying pandas/tests/io/json/test_json_table_schema.py → build/lib.linux-x86_64-3.8/pandas/tests/io/json
creating build/lib.linux-x86_64-3.8/pandas/tests/io/formats
copying pandas/tests/io/formats/test_css.py → build/lib.linux-x86_64-
copying pandas/tests/extension/decimal/test_decimal.py → build/lib.linux-x86_64-3.8/pandas/tests/extension/decimal
copying pandas/tests/extension/decimal/array.py → build/lib.linux-x86_64-3.8/pandas/tests/extension/decimal
creating build/lib.linux-x86_64-3.8/pandas/tests/arrays/categorical
copying pandas/tests/arrays/categorical/test_constructors.py → build/lib.linux-x86_64-3.8/pandas/tests/arrays/categorical
;
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; Didn’t paste the whole error use to word limitations.
----------------------------------------
ERROR: Command errored out with exit status 1: /opt/erpnext/frappe-bench/env/bin/python3 -u -c ‘import sys, setuptools, tokenize; sys.argv[0] = ‘"’"’/tmp/pip-install-jzvrj3se/pandas/setup.py’“'”‘; file=’“'”‘/tmp/pip-install-jzvrj3se/pandas/setup.py’“'”‘;f=getattr(tokenize, ‘"’“‘open’”’“‘, open)(file);code=f.read().replace(’”‘"’\r\n’“'”‘, ‘"’"’\n’“'”‘);f.close();exec(compile(code, file, ‘"’“‘exec’”’"‘))’ install --record /tmp/pip-record-bgopg6dt/install-record.txt --single-version-externally-managed --compile --install-headers /opt/erpnext/frappe-bench/env/include/site/python3.8/pandas Check the logs for full command output.
Updating node packages…
Installing node dependencies for frappe
$ yarn install
yarn install v1.22.4
[1/4] Resolving packages…
success Already up-to-date.
Done in 0.47s.
Bench: Deployment tool for Frappe and Frappe Applications (CLI to Manage Frappe Deployments).
Open source depends on your contributions, so do give back by submitting bug reports, patches and fixes and be a part of the community 
Please help me with this issue: