Game works unplayable slowly

#1

everything seems to work but it’s really slow.
I downloaded vcmi_099, and copy pasted “data, maps, mp3” directories from
my homm3 HD+.

warnings in console:

File CONFIG/DEFAULTTEMPLATES/CROSS3 is not a valid JSON file!
At line 1, position 0 error: Not a valid UTF-8 file

No templates found for 38:1
No templates found for 49:1
No templates found for 70:0
No templates found for 79:7
No templates found for 90:1
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No templates found for 172:0
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No templates found for 189:0
#2

More mods you enable, long AI turn lasts. It’s vcmi thing.