HACS not installing (only a single configuration of hacs is allowed)

System Health details

version	core-2021.4.6
installation_type	Home Assistant OS
dev	false
hassio	true
docker	true
virtualenv	false
python_version	3.8.7
os_name	Linux
os_version	5.4.99
arch	x86_64

Home Assistant Cloud

logged_in	false
can_reach_cert_server	ok
can_reach_cloud_auth	ok
can_reach_cloud	ok

Home Assistant Supervisor

host_os	Home Assistant OS 5.12
update_channel	stable
supervisor_version	supervisor-2021.04.0
docker_version	19.03.13
disk_total	30.8 GB
disk_used	4.3 GB
healthy	true
supported	true
board	ova
supervisor_api	ok
version_api	ok
installed_addons	File editor (5.2.0), ESPHome (1.16.2), Terminal & SSH (9.1.0), Home Assistant Google Drive Backup (0.103.1)

Lovelace

dashboards	1
resources	0
views	1
mode	storage

Checklist

• I’m running the newest version of HACS https://github.com/hacs/integration/releases/latest
• I have enabled debug logging for my installation.
• I have filled out the issue template to the best of my ability.
• I have read https://hacs.xyz/docs/issues
• This issue is related to the backend of HACS.
• This issue only contains 1 issue (if you have multiple issues, open one issue for each issue).

Describe the issue

This issue is identical to #1863 , except that the issue was not caused by a missing file in another integration. I found the cause and created this issue to make you all aware of it. This could be an upstream issue, I’m not sure. After upgrading to 2021.4.6, clicking the HACS icon would not open HACS. So I decided to reinstall it, and in the process of doing so ran in to the issue described in #1863. After much hand-wringing, I found out that there was a HACS related integration configuration in /config/.storage/core.config_entries. After removing that, I was able to install HACS normally. I am not sure what triggered this issue, but maybe the way I solved it could be a good clue

Steps to reproduce

Unknown as of far

Debug logs

Debug logs are not applicable as they literally showed nothing related to this issue.

Logs

PASTE YOUR DEBUG LOGS HERE

[CorvetteCole]

Great, didn’t mean to create an issue with no value. Just solved my issue and wanted to document the solution somewhere so future people could find it.

[ludeeus]

The new version of HA that comes in beta this Wednesday should offer more details when integrations fail to load properly. https://dev--home-assistant-gallery.netlify.app/#demo-integration-card