If it doesn't work and you actually deleted the Fonts then that alone did not free up enough room.  You will need to use a Third Party partition management software to increase the size of the EFI System partition. There will be tutorials on many of those sites to help and if there is not one specific to this situation, we can help.
Hi! I've XPS 17 9700 and can't update Win10 to Win11 because of error “We couldn’t update system reserved partition”. I have already followed the steps from this article (some say it helps for Windows 11 as well): [URL] Unfortunately, removing fonts is not enough. Does anyone else have this problem? Maybe something else can be removed from this partition?Unfortunately, all attempts to resize the partition have failed (also using external tools). [IMAGE]  
“We couldn’t update system reserved partition” error installing Windows 11