Hi there!

Sorry for your issue.

Kindly click on that error link within your Joomla admin while tried to update, it should download the zip file for your right there. Then you can install the zip file through Extentions>Manage>Install.

If the link doesn't work, then download the latest version from the below link and then install:

https://www.joomshaper.com/joomla-extensions/sp-lms

Best Regards