So I'm having an issue where texture files for the various era transitions aren't loading at all, leaving a blank red image in place of the era art, and the game almost always ends up crashing with a "Civilization 5 has stopped working" message somewhere between turn 70 and 90 (usually my games have been played on Huge Continents+ maps with quick speed, and 9 AIs + 24 city-states plus myself). I can't seem to pinpoint the source of this error, but it usually happens after I've ended my turn and the game is processing the turns of the AIs. I've checked xml.log, database.log, and lua.log, but there's no evidence of a game-crashing error in any of them (I'll still post the lua and database logs anyway because maybe you guys can spot something I'm not seeing). As well as using the most recent version of JFDLC as of Feb 15, 2018, with all its bundled mod inclusions as part of the "JFDLC, Custom Civs, and Recommended Mods" option chosen for installation with the exe, I also have "Covert Operations - Making Spies Great Again (v.2)", "InfoAddict (v.22)", "Iska's Holy Wars (v.1)", "Really Advanced Setup (v.15)", "Strange Religions (v.9)", and a mod of my own making which adds a custom civilization (which I've been playing as), but I'm 99.99% certain my self-made custom civ isn't the issue unless JFDLC doesn't play well with custom civs that don't come with the standard installation. If, however, it does turn out to be the main issue, I will post an archived file of it here for download and review, so that I can get assistance making it compatible with JFDLC.
UPDATE: Here are the logs that generated following my attempts to replicate the conditions for the crash. The crash occurred on turn 70, after the barbarians had finished their turn, and did not return a "Civilization 5 has stopped working" message this time, instead resulting in an immediate CTD following a freeze-up for two seconds. Also, something else that got my attention, though is not quite as serious as the other problems is shown in an image link here.