Error installing python-sklearn-doc

# apt install python-sklearn-doc
Reading package lists... Done
Building dependency tree
Reading state information... Done
Suggested packages:
  python-sklearn
The following NEW packages will be installed:
  python-sklearn-doc
0 upgraded, 1 newly installed, 0 to remove and 0 not upgraded.
Need to get 227 kB of archives.
After this operation, 1,200 kB of additional disk space will be used.
Get:1 http://ph.archive.ubuntu.com/ubuntu focal/universe amd64 python-sklearn-doc all 0.22.2.post1+dfsg-5 [227 kB]
Fetched 227 kB in 0s (1,232 kB/s)
Selecting previously unselected package python-sklearn-doc.
(Reading database ... 672827 files and directories currently installed.)
Preparing to unpack .../python-sklearn-doc_0.22.2.post1+dfsg-5_all.deb ...
Unpacking python-sklearn-doc (0.22.2.post1+dfsg-5) ...
Setting up python-sklearn-doc (0.22.2.post1+dfsg-5) ...
Processing triggers for doc-base (0.10.9) ...
Processing 1 added doc-base file...
Error in `/usr/share/doc-base/scikit-learn', line 10: all `Format' sections are invalid.
Note: `install-docs --verbose --check file_name' may give more details about the above error.
Registering documents with dwww...

`install-docs` check gives:
# install-docs --verbose --check /usr/share/doc-base/scikit-learn
Warning in `/usr/share/doc-base/scikit-learn', line 10: file `/usr/share/doc/python-sklearn-doc/stable/index.html' does not exist.
Error in `/usr/share/doc-base/scikit-learn', line 10: all `Format' sections are invalid.
/usr/share/doc-base/scikit-learn: Fatal error found, the file won't be registered.

Thanks for any help you can extend in this regard!

ProblemType: Bug
DistroRelease: Ubuntu 20.04
Package: python-sklearn-doc 0.22.2.post1+dfsg-5
ProcVersionSignature: Ubuntu 5.8.0-40.45~20.04.1-generic 5.8.18
Uname: Linux 5.8.0-40-generic x86_64
ApportVersion: 2.20.11-0ubuntu27.14
Architecture: amd64
CasperMD5CheckResult: skip
CurrentDesktop: LXQt
Date: Mon Jan 25 10:09:17 2021
Dependencies:
 fonts-glyphicons-halflings 1.009~3.4.1+dfsg-1
 fonts-mathjax 2.7.4+dfsg-1
 libjs-bootstrap 3.4.1+dfsg-1
 libjs-mathjax 2.7.4+dfsg-1
InstallationDate: Installed on 2020-07-13 (195 days ago)
InstallationMedia: Ubuntu 20.04 LTS "Focal Fossa" - Release amd64 (20200423)
PackageArchitecture: all
SourcePackage: scikit-learn
UpgradeStatus: No upgrade log present (probably fresh install)