I have looked and searched, over and over, but unless I “missed” it I did not see a solution, I will try the links you have posted.
Also (you asked) why am I reuploading files? I had installed another program on my server awhile ago and the “troubleshooter’s” advice was to delete all the files and upload them “one directory at a time”, supposedly the program was very large, with many files, and “he said” sometimes during the upload / ftp process, some files can get corrupted, so that was “their” solution to fix the problem of a failed install, and that’s why I tried it on WordPress, was hoping it would work, but to no avail.
I still don’t see any help / fixes for the install problem I am having, even after reading the links you posted. ??