error git: 'remote-https' is not a git command when running git clone https://github.com/Yannik/qnap-letsencrypt.git

Platform/Firmware Information QNAP TS-251D


Run
grep -e ^Platform -e ^DISPLAY_NAME  /etc/platform.conf
grep -e ^Version -e ^Build -e Model -e "\[" /etc/default_config/uLinux.conf | grep -v "\[System\]" | awk '1;/\[/{exit}' |grep -v "\["

and paste it here!
Platform = X86_GEMINILAKE
DISPLAY_NAME = TS-251D
Model = TS-X53D
Internal Model = TS-X53B
Version = 5.0.1
Build Number = 20230609
Rsync Model = QNAP
Build Date = 2023-06-09

**Is this the latest firmware for your device?**
Yes

**Issue Summary (provide relevant error messages and log output):**

Got the below error while running git clone. Is there any idea where to start searching/fixing? 
I used the same commands about a year ago. No made a new directory and went to the instructions again to get a cert for two domains.

git clone https://github.com/Yannik/qnap-letsencrypt.git
Cloning into 'qnap-letsencrypt'...
git: 'remote-https' is not a git command.

Yannik / qnap-letsencrypt

error git: 'remote-https' is not a git command when running git clone https://github.com/Yannik/qnap-letsencrypt.git #126