Manila share service image not getting downloaded properly

Hi,

Openstack Stein (Manila Service Failed due to manila-service-image)
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1> I have been trying to deploy a manila service on Ubuntu 18.04.4 (Stein Release),
2> I am using the Linux-bridge option for the Neutron service.
3> Additionally, I am using the generic option for the storage backend, and I have set up a share node on the "compute" node as the Linux-bridge already configured on that node. So far so good with minimal deployment and even with the manila service deployment (for this I have followed https://docs.openstack.org/manila/latest/install/index.html document). But when I tried to create and launch share instances (DHSS option-2) I am facing an error during a share instance creation.

Manila-service-image Problem during download:
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1>I have noticed that the curl command to download the manila-service-image is not functioning properly.
"curl https://tarballs.openstack.org/manila-image-elements/images/manila-service-image-master.qcow2" failed to download the complete 545M file.

2> When I tried to download the same image using "curl -iL https://tarballs.openstack.org/manila-image-elements/images/manila-service-image-master.qcow2" OR "https://tarballs.opendev.org/openstack/manila-image-elements/images/manila-service-image-master.qcow2" it worked properly and I can able to create an image that worked properly with no issue.

3> I am guessing there is no hashing present to verify the image integrity.

Manila_ui Problem
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1> As I am using Openstack installation Guide and installed Horizon using standard procedure as per given document https://docs.openstack.org/horizon/stein/install/
2> I noticed that for the manila_ui service the document does not mentioned the proper package installation to make "share" service worked on Horizon. (https://docs.openstack.org/manila-ui/latest/install/installation.html#manual-installation)

3> When I simply used "apt install python3-manila-ui" it worked.
4> I wonder why pyhton-manila-ui" isn't working for Ubuntu18.04 onward?