After a bit more testing it seems that the reasons for the crashes I've experienced were related to an improper block state key being put in properties of water in which caused the crash. I used theses values (below)
"default_fluid": {
"Name": "minecraft:water",
"Properties": {
"state": 0
}
which lead to the crash after importing the file in the file manager, while if ("state": 0) is changed to ("level": "0") minecraft will subsequent run the code just fine.
also the attached file, a_worldgen_settings1.txt, is the working and updated file.
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This is a graphic card specific issue as my AMD Radeon HD 6900 wasn't having this issue.