LveManager Panelless fails to start with "No module named 'aiohttp_jinja2'" error
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  1. Darren Poulton
  2. 07.01.2021
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Hi folks, I've got a head-scratcher here ...

I've done a fresh install at DigitalOcean from an image of CloudLinux7.9 (yes, I've booted the right kernel and verified using uname). On top of that, I've installed a little open source CP called CyberPanel (which is really quite cool - you should check it out). I'm trying to start the lvemanager service, but keep getting the following error:

ModuleNotFoundError: No module named 'aiohttp_jinja2'

Yes, I've installed aiohttp-jinja2 using pip ... no it doesn't matter whether I use --user or not (error happens both ways)

One thing that concerns me - whenever I run cldetect --check-license, it tells me "No valid license found" - even though checking using the tool at returns a valid license just fine (license was activated when I booted the image and is not an IP-based license ... it IS a trial license though).

I'm out of ideas, and thought you fine folks might be able to come up with a few. Any help greatly appreciated and will receive a hearty thumbs-up emoji (if I can find one here) :p
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  1. 08.01.2021 11:01:10
  2. # 1
Posts: 285
Joined: 31.01.2017
Hi Darren,

First, make sure the system is registered by running:

yum install rhn-setup --enablerepo=cloudlinux-base
/usr/sbin/rhnreg_ks --activationkey=<activation key>
cldetect --check-license

If the previous returns no errors, run:

yum install alt-python37-devel
yum reinstall lvemanager
  1. 08.01.2021 13:01:58
  2. # 2
Darren Poulton Accepted Answer
Posts: 0
Joined: 13.04.2021
Hi Alexandre,

Thanks for getting back to me.

As stated, rhn-setup is installed, my activation key has been registered using `rhnreg_ks` and the server is displayed under my control panel at When I use the license check at, it returns a valid license message - but when I use the `cldetect --check-license` command-line function, it returns the error "No valid license found". I've re-run the registration I several times, and `cldetect` still returns an invalid license error.

After `reinstall lvemanager`, I'm still getting the ModuleNotFoundError: No module named 'aiohttp_jinja2' error.
  1. 08.01.2021 15:01:32
  2. # 3
Posts: 285
Joined: 31.01.2017

We've removed the server from your trial key just to exclude licensing issues, so please register the system once again. If the issue persists, do not hesitate to submit a ticket on
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