Clean Journal theme (Free) Font change after Failed WordPress Backup and Update

Hello Everyone, Recently, I got this mail about the automatic backup for my wordpress installation; Auto upgrade process for the following installation cannot be completed, because it does not meet the upgrade requirements : Installation URL : http://intechreviews.com Current Version : 4.7.5 Latest Version : 4.8 Error : It is not possible to upgrade WordPress Multisite installations. I then noticed that the font on the website https://intechreviews.com had changed. It was no longer sharp like it was before. This remained so even after I manually backed up and updated the wordpress installation. In a previous troubleshooting on how to alter the height of the line spacing for the "Clean Journal" theme, Mahesh responded "You can directly change the value from 1.7 to 1.3 in the the editor but this is not recommended as you'll lose this during theme update".I don't know whether this has anything to do with the current problem. Nevertheless, I would like the font to revert to how it was before or at the least for the font to be like that found here instead; https://mtn4u.com . Thanks