% lektor server Traceback (most recent call last): File "/usr/local/bin/lektor", line 33, in <module> sys.exit(load_entry_point('Lektor==3.2.2', 'console_scripts', 'lektor')()) File "/usr/local/lib/python3.8/site-packages/lektor/cli.py", line 766, in main cli.main(args=args, prog_name=name) File "/usr/local/lib/python3.8/site-packages/click/core.py", line 1053, in main rv = self.invoke(ctx) File "/usr/local/lib/python3.8/site-packages/click/core.py", line 1659, in invoke return _process_result(sub_ctx.command.invoke(sub_ctx)) File "/usr/local/lib/python3.8/site-packages/click/core.py", line 1395, in invoke return ctx.invoke(self.callback, **ctx.params) File "/usr/local/lib/python3.8/site-packages/click/core.py", line 754, in invoke return __callback(*args, **kwargs) File "/usr/local/lib/python3.8/site-packages/click/decorators.py", line 84, in new_func return ctx.invoke(f, obj, *args, **kwargs) File "/usr/local/lib/python3.8/site-packages/click/core.py", line 754, in invoke return __callback(*args, **kwargs) File "/usr/local/lib/python3.8/site-packages/lektor/cli.py", line 471, in server_cmd from lektor.devserver import run_server File "/usr/local/lib/python3.8/site-packages/lektor/devserver.py", line 9, in <module> from lektor.admin import WebAdmin File "/usr/local/lib/python3.8/site-packages/lektor/admin/__init__.py", line 1, in <module> from .webui import WebAdmin File "/usr/local/lib/python3.8/site-packages/lektor/admin/webui.py", line 7, in <module> from flask.helpers import safe_join ImportError: cannot import name 'safe_join' from 'flask.helpers' (/usr/local/lib/python3.8/site-packages/flask/helpers.py)