I have very little idea as to what the problem might be. Given the rarity of this problem, I believe that your file/folder locations are the source of the problem.
Check the location stated in the error(res:/ means the folder containing the executable for Strive) to see if that file is located there.
Also check the ".import" folder in the same location as the Strive executable for a file named "006.png-157f5701c166731c8255510e6753490c.stex".
I noticed that you also posted in another thread where you mentioned altering the scripts. If you have altered your scripts, then I would suggest trying an unaltered version to see if the problem goes away and try altering the files more carefully next time.