The mod seems to work fine, but this error is showing up in my log and seems like it deserves a look:

[13:05:15] [main/ERROR] [tallgates]: The mod tallgates is expecting signature 62:AC:69:4A:82:E9:1B:F4:40:10:2D:9C:1C:00:D2:0D:89:F2:B5:F3 for source TallGates-1.12.2-1.0.0.1.jar, however there is no signature matching that description