Jomres has a feature where it can automatically download and install library package files, this means that we don't need to do a full Jomres update in the event that one of the libraries the system depends on is discovered to have a security vulnerability that needs to be quickly addressed. It also allows me to make the Core of Jomres much smaller, meaning updates are typically quicker too.
The system uses temporary files where a hash of a file is saved and compared to a similar file on one of our servers, however occasionally when you update, if you should run out of disk space during the update, or if there's a communication issue between your server at the same time you can run into issues with this sha file.
If you should ever run into this problem, the easiest solution is to FTP into your site, navigate to the /jomres/libraries/node_modules/ and /jomres/libraries/vendor/ and delete the sha.php files then revisit your Jomres installation. It may be slow for the first time as Jomres will be re-installing the library packages again, but unless there's an ongoing problem you should be good to go afterwards.
If you suspect, at any time, that the library files weren't updated properly you can visit the Admin > Jomres > Tools page and use the Library Packages page there to re-install the packages again.