Problem with fail2ban plugin after update to 2.1.0p23

Gote the follwing error after upgrade from 2.1.0p9 to 2.1.0p23:

-| Failed to load plugin /omd/sites/cdp/local/share/check_mk/web/plugins/perfometer/fail2ban.py: cannot import name 'perfometers' from 'cmk.gui.plugins.views.perfometers' (unknown location)
-| Traceback (most recent call last):
-|   File "/omd/sites/cdp/lib/python3/cmk/gui/utils/__init__.py", line 186, in load_web_plugins
-|     exec(f.read(), globalvars)
-|   File "<string>", line 1, in <module>
-| ImportError: cannot import name 'perfometers' from 'cmk.gui.plugins.views.perfometers' (unknown location)
-|
-| ERROR: Failed to load some GUI plugins. You will either have
-|        to remove or update them to be compatible with this
-|        Checkmk version.

there are some imports from cmk:

from cmk.gui.plugins.views.perfometers import (
perfometers,
render_perfometer,
perfometer_linear,
perfometer_logarithmic,
perfometer_logarithmic_dual,
perfometer_logarithmic_dual_independent,
)

Did the functions move or have they been renamed?
Any help is appreciated.