I have the same issue.

Mod list : 

• 1480616_2050377
• 1483265_1936760
• 1493230_2203429
• 1505828_2117306
• 1535911_2049715
• 1549034_2219197
• 1614082_2209120
• 1618619_2209066
• 1727435_2209088

• overhaul
• rebalanced infrastructure

• balance buffs and changes collection

• extended naval combat

• super pack

• buythis!

• deepsea

• compatibility deepsea super culture

• compatibility naval combat super culture

• load the mods
• load the save
• check the technology costs --> all costs at 0

• technologies should have a cost different from 0
• only 1 Diagnostics file should be generated --> it looks like an infinite loop happening after the save has been loaded. I stopped the game quickly so I "only" had 113 files. The 2nd file and all the others are similar : the file is filled by the error "Index was outside the bounds of the array"

• 2 saves : the save with the error and my last save without the error
• 2 diagnostic files

Same here and I only have 2 mods

Official Endless

2 star neolithic

Even with a new modded game, the bug is still here.
I hope a fix will be deployed very quickly. I would like to play but I can't.

Is there a chance that a fix come soon ?

zonoz wrote:

Is there a chance that a fix come soon ?

The 10 star era 2 star neolithic mod was updated and works correctly now, I can't speak to any other mods with this problem though.

Oh is that it?  Yeah I had this problem, and I'm reinstalling the game right now, but I am in fact using the 10 era star mod.

Thank you for your answer PhoenixStriker.

I tried to reinstall the game version just before the last update but I can't. 

It's very annoying because this feature exists on Steam but it's not really used by this game (or perhaps I did something wrong ?)

I re installed the game, try a new game with a 2nd set of mods and I had again the issue at the first era, when we have to choose the 1st tech.
I will retry one day but for now I'm playing with Civilization VI.