Custom Block Manager did not save and save button turn to grey

Dear PKP,

I am facing similar issues to this link [SOLVED] Custom Block Manager didnt save - #10 by xavi, where when saving the logo/images under custom block manager (the loading takes forever), how do I paste the patch? Should I paste this patch, in every logo source code that I want to add, or should I delete the existing custom block manager? and create new custom block manager? and paste this patch in the source code? Will there be any risk associated with loss of data when pasting this patch in source code? The OJS version that our journal using is

Thank You