can't upgrade to openlitespeed enterprise

After pasting the licence number I get this massage :

Reading package lists…
Building dependency tree…
Reading state information…
Package ‘openlitespeed’ is not installed, so not removed
The following packages were automatically installed and are no longer required:
fonts-droid-fallback fonts-noto-mono libavahi-client3 libavahi-common-data
libavahi-common3 libcups2 libgs9 libgs9-common libijs-0.35 libjbig2dec0
liblua5.2-0 libopenjp2-7 libpaper-utils libpaper1 linux-headers-5.4.0-51
linux-headers-5.4.0-51-generic linux-image-5.4.0-51-generic
linux-modules-5.4.0-51-generic poppler-data
Use ‘sudo apt autoremove’ to remove them.
0 upgraded, 0 newly installed, 0 to remove and 4 not upgraded.
groupadd: group ‘nobody’ already exists
–2021-03-15 00:37:56--
Resolving (…
Connecting to (||:443… connected.
HTTP request sent, awaiting response… 404 Not Found
2021-03-15 00:37:56 ERROR 404: Not Found.

tar (child): lsws-5.4.2-ent-x86_64-linux.tar.gz: Cannot open: No such file or directory
tar (child): Error is not recoverable: exiting now
tar: Child returned status 2
tar: Error is not recoverable: exiting now
Failed to install LiteSpeed. [404]